JP2020042456A - Computer, calculation confirmation method, information registration method, and program - Google Patents

Abstract

To provide a computer capable of confirming which function has been executed by a key operation when checking a calculation result in the case a plurality of functions are assigned to one key.SOLUTION: A calculator 10 registers a plurality of calculation data including numerical data indicating a numerical key and operation data indicating a function key to which a function is assigned, in a calculation data storage area 22s in the order of input. The calculator 10, when a first function and a second function are assigned to the function key, adds first extended information indicating the first function to the calculation data if the first function is designated by an operation on the function key, and adds second extended information indicating the second function to the calculation data if the second function is designated. The calculator 10 displays a numerical value corresponding to the numerical data on a display unit in accordance with an instruction to confirm the calculation data, and displays a first symbol on the display unit when the first extended information is added to the calculation data and displays a second symbol on the display unit when the second extended information is added.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a computer having a check function, a calculation confirmation method, an information registration method, and a program.

  2. Description of the Related Art Some recent computers (calculators) are provided with a check function capable of confirming whether a previously executed calculation result is correct. A calculator having a check function stores, for example, numerical data input for calculation and a key code indicating an operated physical key in association with each other. At the time of verification, numerical data and a key code are sequentially read in accordance with a user operation, and a numerical value and a symbol corresponding to the key code are displayed, so that the input operation at the time of the calculation performed earlier can be confirmed.

  Some recent calculators have a tax calculation function for calculating a tax rate as well as normal calculations such as four arithmetic calculations. This type of calculator is provided with a tax calculation key (calculation key including tax, calculation key without tax) for instructing execution of a tax-inclusive calculation based on a preset tax rate with respect to the input numerical value, for example. I have. The tax calculator calculates the tax-inclusive amount based on the tax rate corresponding to the tax calculation key based on the numerical value calculated normally by any four arithmetic calculations or the numerical value entered individually according to the operation on the tax calculation key. To display.

JP 2018-49379 A JP 2017-174225 A

  In a calculator provided with a tax calculation function, in order to calculate taxes for a plurality of tax rates, it is necessary to provide a tax-inclusive calculation key and a tax exemption key corresponding to each of the plurality of tax rates. However, since the number of keys provided on the surface of the calculator housing is limited, multiple functions can be assigned to one physical key in order to calculate tax for more tax rates. Conceivable.

  In this case, in order to confirm the input operation at the time of calculation by the reconciliation function, the key code corresponding to the operated key is stored one by one in the same manner as in the past, and the symbol corresponding to the key code is displayed at the time of reconciliation. However, it cannot be confirmed which function has been executed.

  The present invention has been made in consideration of the above-described problem, and when a plurality of functions are assigned to one key, when checking the calculation result, which function is operated by the key operation. It is an object of the present invention to provide a computer, a calculation confirmation method, an information registration method, and a program configured to be able to confirm whether or not the execution has been performed.

  In order to solve the above-mentioned problem, a calculator of the present invention displays numerical data indicating the numerical key input by an operation on a numerical key, and the function key input by an operation on a function key to which a function is assigned. Calculation data registration means for registering a plurality of calculation data including calculation data in an input order; and when a first function and a second function are assigned to the function key, the first function and the second function are operated by operating the function key. Determining means for determining which of the second functions has been specified; and adding first extended information indicating the first function to the calculation data when determining that the first function has been specified. Information adding means for adding second extended information indicating the second function to the calculation data when it is determined that the second function has been designated; In response to the instruction to confirm, a numerical value corresponding to the numerical data is displayed on a display unit, and a first symbol is displayed on the display unit when the calculated data is added to the first extended information, First display means for displaying a second symbol on the display unit when the second extended information is added to the calculation data.

The front view showing the appearance composition of the tax calculator in this embodiment. FIG. 2 is a block diagram showing a configuration of an electronic circuit of the calculator according to the embodiment. 6 is a flowchart for explaining the operation of a tax calculation function of the calculator according to the embodiment. 6 is a flowchart for explaining the operation of a tax calculation function of the calculator according to the embodiment. 6 is a flowchart for explaining the operation of a tax calculation function of the calculator according to the embodiment. 6 is a flowchart for explaining the operation of a tax calculation function of the calculator according to the embodiment. 6 is a flowchart for explaining the operation of a tax calculation function of the calculator according to the embodiment. 6 is a flowchart for explaining the operation of a tax calculation function of the calculator according to the embodiment. 6 is a flowchart for explaining the operation of a tax calculation function of the calculator according to the embodiment. The figure which shows the input operation for demonstrating the tax calculation function of a calculator, and the specific example of a display. The figure which shows the specific example of the calculation data for demonstrating the tax calculation function of a calculator. The figure which shows the specific example of a display for demonstrating the tax calculation function of a calculator. FIG. 4 is a view showing a specific example of an input operation and a display for explaining a tax calculation function of the calculator according to the embodiment. FIG. 6 is a diagram showing a specific example of calculation data for explaining a tax calculation function of the calculator according to the embodiment. FIG. 4 is a view showing a specific example of an input operation and a display for explaining a tax calculation function of the calculator according to the embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing an external configuration of the tax calculator according to the present embodiment. In the present embodiment, the tax calculator is realized as a calculator 10 dedicated to calculation.

  In addition, the tax calculator is configured as the calculator 10, and has a calculation function (a calculation processing program is mounted), such as a personal computer, a tablet computer, a smartphone, a mobile phone, a touch panel PDA (personal digital assistants), an electronic book, It can be configured as a portable game machine or the like. It should be noted that a tax calculator with no physical keys (buttons) such as the calculator 10 displays a software keyboard similar to the keys of the calculator 10 and executes calculation processing in accordance with key operations on the software keyboard. .

  The calculator 10 according to the present embodiment is provided with a tax calculation function for calculating a tax at a plurality of tax rates, for example, at five different tax rates. For example, in India, five kinds of tax rates (0%, 5%, 12%, 18%, and 28%) are used as consumption tax. Therefore, the calculator 10 according to the present embodiment is suitable for tax calculation for calculating the total amount of a product in which a plurality of types of consumption tax of five or less are mixed in India and the like.

  A key input unit 11 including a plurality of keys, a display unit 12, and a solar panel 13 are provided on the front of the housing of the calculator 10. The key input unit 11 is provided with numerical keys, calculation function keys, tax calculation function keys, function keys, and check function keys. The numerical keys include, for example, a plurality of keys corresponding to [00] [0] to [9]. The operation function keys include, for example, a [+] (addition) key 11h1, a [-] (subtraction) key 11h2, a [×] (multiplication) key 11h3, and a [算] (division) key, which are used for normal calculations by four arithmetic operations. 11h4, including a plurality of keys corresponding to the [=] (calculation execution) key 11h0.

  The tax calculation function keys include a tax calculation key ([GST + n (TAX-n)]) 11b, a tax calculation total key ([GST GT (GT)]) 11c, and a tax calculation mode switching key ([GST + / TAX-]). 11d is provided. Here, GST is an abbreviation for “Goods and Service Tax” which means Indian consumption tax. The character string in [] (however, the character string in () is excluded) indicates the character string printed on the key top of each tax calculation key 11 b, and further in () in []. Is a character string printed on the front of the housing of the calculator 10 for the sake of convenience. In this specification, not only the tax calculation key 11b but also the same notation is used.

  The tax calculation key ([GST + n (TAX-n)]) 11b includes a tax 0 calculation key ([GST + 0 (TAX-0)]) 11b0, a tax 1 calculation key ([GST + 1 (TAX-1)]) 11b1, and a tax 2 calculation keys ([GST + 2 (TAX-2)]) 11b2, tax 3 calculation keys ([GST + 3 (TAX-3)]) 11b3, and tax 4 calculation keys ([GST + 4 (TAX-4)]) 11b4. The tax 0 calculation key ([GST + 0 (TAX-0)]) 11b0 is operated to input a tax calculation execution instruction using the tax rate 0. Similarly, a tax 1 calculation key ([GST + 1 (TAX-1)]) 11b1, a tax 2 calculation key ([GST + 2 (TAX-2)]) 11b2, and a tax 3 calculation key ([GST + 3 (TAX-3)]) 11b3 and a tax 4 calculation key ([GST + 4 (TAX-4)]) 11b4 are operated to input a tax calculation execution instruction using the tax rate 1, the tax rate 2, the tax rate 3, and the tax rate 4, respectively. In this specification, as described above, when the tax calculation key ([GST + n (TAX-n)]) 11b is used, “n” is used instead of each numerical value from 0 to 4. In the present specification, not only the tax calculation key 11b but also a specific numerical value when there is no particular limitation on which numerical value (an integer from 0 to 4) can be taken by “n”. This will be described for convenience using “n” instead of “n”.

  One tax calculation key 11b (tax n calculation keys 11b0 to 11b4) also serves as a tax-inclusive calculation key [GST + n] and a tax-exempt calculation key [TAX-n]. The tax calculation key 11b (tax n calculation key 11b0 to 11b4) is a tax-inclusive calculation key [GST + n] or a tax-inclusive calculation key [GST + n] according to the tax calculation mode switched in response to the operation of the tax calculation mode switching key ([GST + / TAX-]) 11d. Used as a tax-excluding calculation key [TAX-n]. By sharing one tax calculation key 11b as a tax-inclusive calculation key [GST + n] and a tax-exclusive calculation key [TAX-n], a limited area of the front surface of the housing is effectively used, and a plurality of (five types) are used. A key is provided that can execute a tax-inclusive calculation process and a tax-excluding calculation process corresponding to each tax rate.

  The tax rates (tax rates 0 to 4) assigned to the tax calculation keys 11b (tax n calculation keys 11b0 to 11b4) are preset when the calculator 10 is shipped from the factory. For example, five tax rates (0%, 5%, 12%, 18%, and 28%) are set in the tax n calculation keys 11b0 to 11b4, respectively, in accordance with use in India. The tax rates (tax rates 0 to 4) assigned to the tax n calculation keys 11b0 to 11b4 can be arbitrarily set by a user operation.

  The tax calculation total key ([GST GT (GT)]) 11c includes a grand total key ([GT] key) for displaying a grand total for normal calculations (basic calculations) such as four arithmetic calculations and constant calculations, and a tax calculation key. Also serves as a GST grand total key ([GST GT] key) for displaying the total sum for the calculation result of. When the tax calculation total key 11c functions as a GST grand total key, the tax calculation is performed and the processing mode of the calculator 10 transits to the tax total recall mode (GST GT recall mode). On the other hand, when the tax calculation total key 11c functions as a grand total key, the processing mode of the calculator 10 does not particularly change, and the numerical value stored in the total memory area 22h is simply called and displayed on the display unit 12. Is done. These processes will be described later in detail with reference to FIG.

  The tax calculation total key 11c functions as either a grand total key ([GT] key) or a GST grand total key ([GST GT] key) depending on the operation state immediately before the tax calculation total key 11c is operated. I do. That is, for example, when the tax calculation total key 11c is pressed immediately after the tax calculation is performed by operating the tax calculation key 11b, the tax calculation key 11b is used to display the total amount of the tax calculation result on the GST. Functions as a grand total key ([GST GT] key). Further, for example, when the tax calculation total key 11c is pressed immediately after the normal calculation is performed by operating the calculation execution key ([=] key) 11h0, that is, the tax calculation is performed by operating the tax calculation key 11b. If it is not immediately after, the tax calculation key 11b functions as a grand total key ([GT] key) for displaying a grand total for a normal calculation (basic calculation).

  The function keys include, for example, an all clear key ([AC] key 11a), a clear key ([C] key), a plurality of memory keys ([MRC] [M-] [M +]), and a root key ([√] key). ), [%] Key 11g and the like. The [%] key 11g is used not only for calculating the percentage, but also for setting a tax rate corresponding to each of the tax calculation keys 11b (tax n calculation keys 11b0 to 11b4) to a value input by key operation. Used to initiate the configuration process.

  The check function key is a key used in the check function for confirming / correcting the contents of the calculation executed earlier. The verification function keys include a confirmation key ([CHECK BACK] key 11e, [CHECK FWARD] key 11f) and a correction key ([CORRECT] key) 11k. [CHECK BACK] key 11e and [CHECK FWARD] key 11f are keys for switching and displaying the contents (calculation data) of the previously executed calculation in units of steps. When the [CHECK BACK] key 11e is operated, the display is switched to the calculation data of the step in the direction in which the number of steps is small, and when the [CHECK FWARD] key 11f is operated, the calculation data in the direction in which the number of steps is large is displayed. Switch the display. In addition, one step is a unit of “numeric value + function” input for calculation. In the “function”, a code of a key operated for four arithmetic calculations, tax-inclusive calculations, tax-excluding calculations, and the like is stored.

  When a plurality of functions are assigned to one key, which function is executed by the key operation by associating the calculation data indicating the contents of the calculation with the code corresponding to the operated key one-to-one. (Key information described later) is added.

  In the calculator 10 of the present embodiment, two functions of a tax-inclusive calculation and a tax-excluding calculation are assigned to one tax calculation key 11b (11b0 to 11b4). Therefore, when the tax calculation key 11b [GST + n (TAX-n)] is operated as the tax-inclusive calculation key [GST + n], the extended information indicating the tax-inclusive calculation and the tax rate [n] set in the tax calculation key 11b is calculated. When added to the data and operated as the tax-excluding calculation key [TAX-n], extended information indicating the tax-excluding calculation and the tax rate [n] set in the tax calculation key is added to the calculation data.

  In the description of the present embodiment, among the plurality of keys provided on the calculator 10, the key to which a plurality of functions are assigned is only the tax calculation key 11b used for tax calculation. Function can be assigned. In addition, the plurality of functions assigned to one key can target functions other than the tax calculation. Further, not only two functions may be assigned, but also three or more functions may be assigned.

  The correction key 11k is a key for instructing the correction of the content of the calculation (“the number input + function”) displayed by operating the [CHECK BACK] key 11e or the [CHECK FWARD] key 11f. By inputting the content of the corrected calculation after operating the correction key 11k, the displayed previously input calculation data can be corrected.

The round selector 11y sets a calculation method of the fraction processing. For example, the “F” setting specifies the display of the maximum displayable digit including the decimal part on the display unit 12. The “CUT” setting specifies the truncation of the digit specified by the decimal point selector 11z. The “UP” setting specifies rounding of the digit specified by the decimal point selector 11z. The “5/4” setting specifies the rounding of the digit specified by the decimal point selector 11z. The decimal point selector 11z sets how many digits after the decimal point are displayed on the display unit 12. The “ADD ₂ ” setting specifies the decimal point setting to a predetermined number of digits for the input numerical value.

  The display unit 12 includes a dot matrix type liquid crystal display unit. The display unit 12 displays numerical values input by operating the keys of the key input unit 11. The display unit 12 displays numerical values for a limited number of lines (for example, one line). Characters and symbols (symbols) indicating the calculation mode being set and various setting states are displayed in a state display area provided along the side of the display unit 12. For example, in the status display area, the number of steps 12a, the tax calculation mode symbol 12b, the tax calculation key symbol 12c, the tax total recall mode symbol 12d, the total sum display symbol 12e, the memory symbol 12f, the confirmation mode symbol 12g, and the like are displayed. . In FIG. 1, all displayable symbols are shown on the same screen for the sake of convenience in describing the status display area. However, in an arbitrary state that the calculator 10 can take, such a large number of symbols are the same. They are not always displayed on the screen at the same time.

  The step number 12a indicates the position of the current step to be displayed, with “numerical value + function” input by operating the key of the key input unit 11 as one step. The tax calculation mode symbol 12b is a mode symbol indicating the current tax calculation mode. In the case of the tax-inclusive calculation mode in which the tax-inclusive calculation is performed, for example, [GST +] is displayed, and the tax-exclusive calculation mode in which the tax-exclusive calculation is performed. In this case, for example, [TAX-] is displayed.

  The tax calculation key symbol 12c is a function symbol indicating the tax rate used for the tax calculation and either the tax-inclusive calculation or the tax-excluding calculation when the tax calculation is performed by operating the tax calculation key 11b. When the tax calculation key 11b is used as the tax included calculation key [GST + n], any one of [GST + 0], [GST + 1], [GST + 2], [GST + 3], and [GST + 4] corresponding to each of the tax rates 0 to 4 is displayed. Is done. When the tax calculation key 11b is used as the tax-excluded calculation key [TAX-n], [TAX-0], [TAX-1], [TAX-2], [TAX-2] corresponding to the tax rates 0 to 4, respectively. TAX-3] or [TAX-4] is displayed.

  The tax total recall mode symbol 12d is a mode symbol indicating that a transition has been made to the tax total recall mode (GST GT recall mode) by operating the tax calculation total key ([GST GT (GT)]) 11c, for example, “RCL”. Is displayed. In the tax total recall mode, a total sum of tax calculations calculated at each tax rate (tax rates 0 to 4) is calculated in accordance with a key operation on the tax calculation total key 11c. The amount can be switched and displayed. In the tax total recall mode, a tax rate to be displayed (tax rates 0 to 4) is specified by a key operation on the tax calculation key 11b. The amount and the total tax amount can be switched and displayed.

  The total display symbol 12e is a symbol indicating that the calculation result of the normal calculation performed in response to the operation of the calculation execution key [=] 11h0 is stored in the total memory area 22h. For example, "GT" is displayed. You. The memory symbol 12f is a symbol indicating that a numerical value is stored by a memory function in response to an operation of a memory key ([M-] [M +]).

  The confirmation mode symbol 12g is a mode symbol (indicating that a transition has been made to a confirmation (review) mode in which the content (calculation data) of the previously executed calculation is displayed according to the operation of the checkback key 11e or the check forward key 11f. For example, “REV” is displayed.

  The solar panel 13 generates electric power when the illuminance of ambient light when the calculator 10 is used is bright to some extent. The solar panel 13 functions as a power supply unit 26 (shown in FIG. 2) of the calculator 10 during power generation, and supplies power to each unit of the calculator 10. When the solar panel 13 is not generating power, power is supplied to each unit of the calculator 10 from a primary battery as a power supply unit 26 separately provided in the calculator 10.

  FIG. 2 is a block diagram illustrating a configuration of an electronic circuit of the calculator 10 according to the present embodiment. The electronic circuit of the calculator 10 includes a plurality of units constituting a computer including a CPU 21.

  The CPU 21 controls the operation of each part of the circuit by executing the calculation processing program 22a stored in the memory 22. When an input operation is performed on the key input unit 11, the CPU 21 detects a key on which an input operation has been performed based on a key input signal from the key input unit 11, and executes various calculation processes according to the detected keys. I do. In the calculator 10, the CPU 21 controls the operation of each part of the circuit according to the instructions described in the calculation processing program 22a, and the software and the hardware operate in cooperation to execute the processing by the calculation function described in the following operation description. Implement calculation processing including:

  The calculation processing program 22a may be stored in the memory 22 in advance, may be read from an external recording medium 23 such as a memory card via the recording medium reading unit 23, or may be communicated via the communication unit 25. It may be downloaded from the server 30 on the network N (including the Internet or the like).

  In addition to the calculation processing program 22a, the memory 22 stores an area (tax memory) for storing the calculation result of the tax calculation, a total memory area 22h, a total tax recall mode area 22k, a tax calculation mode area 22m, and a buffer memory. An area for storing each data such as an area 22n, a display memory area 22p, a calculation mode area 22r, and a calculation data storage area 22s is provided. The tax memory (first memory) includes a tax rate 0 total memory area 22b, a tax rate 1 total memory area 22c, a tax rate 2 total memory area 22d, a tax rate 3 total memory area 22e, a tax rate 4 total memory area 22f, and a tax total memory area 22g. Is included. In the following description, the tax rate 0 total memory area 22b, the tax rate 1 total memory area 22c, the tax rate 2 total memory area 22d, the tax rate 3 total memory area 22e, and the tax rate 4 total memory area 22f are collectively referred to as tax totals by tax rate. It may be described as memory areas 22b to 22f.

  The tax rate 0 total memory area 22b is an area for storing data calculated by a tax calculation based on the tax rate 0. In the tax rate 0 total memory area 22b, a numerical value based on the result of the tax-inclusive calculation of the tax rate 0 is stored. Specifically, the tax amount (the 0th tax amount), the tax amount (the 0th tax amount), and the tax amount as a result of the tax-inclusive calculation of the tax rate 0 performed at least once after the input operation of the [AC] key 11a, The total amount of the tax-excluded amount (the 0th tax-excluded amount) is stored as the 0th tax-included total amount, the 0th tax-excluded total amount, and the 0th tax total amount, respectively. Further, the tax rate 0 total memory area 22b stores a numerical value indicating the tax rate 0 set for the tax 0 calculation key ([GST + 0 (TAX-0)]) 11b0.

  The tax rate 1 total memory area 22c, the tax rate 2 total memory area 22d, the tax rate 3 total memory area 22e, and the tax rate 4 total memory area 22f are based on the respective tax rates 1 to 4 in the same manner as the tax rate 0 total memory area 22b. This is an area for storing data calculated by the tax calculation. Detailed description is omitted.

  The tax total memory area 22g is an area for storing data indicating a total of numerical values calculated by tax calculations based on all tax rates 0 to 4. In the tax total memory area 22g, the total tax-included total amount including the 0 to 4th tax-inclusive total amount, the total tax-excluded total amount corresponding to the tax-included total total amount, and the tax-inclusive amount are provided in accordance with the input operation of the tax calculation total key 11c. The total tax amount corresponding to the total amount is stored.

  The total memory area 22h is an area for storing data indicating a total of numerical values calculated by the normal calculation (second memory). In the total memory area 22h, the calculation result of the normal calculation is calculated according to the operation of the calculation execution key [=] 11h0, and the numerical value as the calculation result is added to the numerical value stored in the total memory area 22h. .

  In the total tax recall mode area 22k, a total tax recall mode flag indicating whether or not the user is in a recall mode in accordance with an input operation on the total tax calculation key 11c is set to an ON state or an OFF state. The tax total recall mode is turned on when the tax calculation total key 11c is pressed immediately after the tax calculation by operating the tax calculation key 11b (transition to the tax total recall mode). The tax total recall mode is turned off when, for example, the [AC] key 11a is operated as a predetermined instruction for turning off the tax total recall mode. The switching of the tax total recall mode on / off is not limited to the operation of the tax calculation total key 11c and the [AC] key 11a. For example, on / off of the tax total recall mode may be switched according to another key operation or the processing result of the calculator 10.

  When the total tax recall mode is on, every time the total tax calculation key 11c is operated (pressed), the total total including tax, the total total before tax, and the total total tax are stored in the total tax memory area 22g. The amount can be switched and displayed. When the tax total recall mode is in the ON state, each time the tax calculation key 11b (the tax n calculation keys 11b0 to 11b4) is operated (pressed), the tax total is stored in the tax total memory areas 22b to 22f for each tax rate. , The total amount including tax, the total amount without tax, and the total amount of tax can be switched and displayed.

  The ON state of the tax total recall mode is maintained even when the numerical keys and the calculation function keys of the key input unit 11 are input. Therefore, while the result of the tax calculation is displayed and confirmed by the input operation of the tax calculation total key 11c or the tax calculation key 11b (11b0 to 11b4), the normal calculation using the numerical keys and the calculation function keys can be executed. . In the normal calculation in the ON state of the total tax recall mode, a numerical value as a result of the tax calculation is displayed on the display unit 12, and four arithmetic calculations can be executed on the number displayed on the display unit 12. .

  The tax calculation mode area 22m stores tax calculation mode data that is switched according to an input operation on the tax calculation mode switching key 11d and that indicates the state of the tax included calculation mode or the tax excluded calculation mode.

  The buffer memory area 22n stores the numbers entered so as to form a unit in combination with the last input function. The display memory area 22p stores the numerical value displayed on the display unit 12 at that time. For example, when the numerical value “100” is operated as a numerical value by operating a numerical key and the tax 1 calculation key ([GST + 1 (TAX-1)]) 11b1 is sequentially operated as a function, the numerical value is stored in the buffer memory area 22n as the numerical value. Is stored in the display memory area 22p, and the numerical value “105” also displayed on the display unit 12 as a result of the tax-inclusive calculation of the tax rate 1 is stored (however, the tax rate 1 is 5%). if you did this). As described above, the numerical values stored in the buffer memory area 22n and the display memory area 22p are sequentially overwritten and updated according to the latest input operation.

  In the calculation mode area 22r, mode data indicating the current calculation mode of the calculator 10 is stored. The calculation mode includes, for example, a calculation registration (normal) mode and a confirmation (review) mode. In the calculation registration mode, “numerical value + function” input by a key operation when a normal calculation or a tax calculation is executed is set as one step, and calculation data indicating the contents of the calculation is sequentially stored in the calculation data storage area 22s. (Register) mode. The confirmation mode is set in accordance with the operation of the confirmation keys ([CHECK BACK] key 11e, [CHECK FWARD] key 11f), and displays the contents of the calculation indicated by the calculation data registered in the calculation data storage area 22s in the calculation registration mode. , A mode in which the display unit 12 displays the data in units of steps.

  The calculation data storage area 22s is an area used as a verification memory for storing data for a verification function. The calculation data storage area 22s secures a plurality of steps (for example, 300 steps), and has one-to-one correspondence between numerical data indicating a numerical value input by a key operation for normal calculation or tax calculation and a key indicating a function. Corresponding codes (operation data) are stored in association with each other. In the calculator 10 according to the present embodiment, when a plurality of functions are assigned to one key, it is determined not only the code corresponding to the key one-to-one but also which function has been designated by operating the key. The extended information (key information to be described later) indicating the determined function is stored. The extended information is referred to in order to display a function symbol representing a function executed by an operated key when displaying calculation data in steps in the confirmation (review) mode.

  In the calculator 10 of the present embodiment, the tax calculation key 11b (tax n calculation keys 11b0 to 11b4) is also used as the tax-inclusive calculation key [GST + n] and the tax-excluding calculation key [TAX-n]. That is, two functions of the tax-inclusive calculation and the tax-exclusive calculation are assigned to one tax calculation key 11b (tax n calculation keys 11b0 to 11b4). Therefore, when the tax calculation key 11b (tax n calculation keys 11b0 to 11b4) is operated for tax calculation, in addition to the code indicating the tax calculation key 11b (tax n calculation keys 11b0 to 11b4), calculation including tax or tax is performed. Extended information (key information) indicating any of the extraction calculations is stored in the calculation data storage area 22s.

  Next, the operation of the calculator 10 in the present embodiment will be described. 3, 4, 5, 6, 7, 8, and 9 are flowcharts for explaining the operation of the calculation function of the calculator 10 in the present embodiment.

  First, the user operates (presses) the [AC] key 11a to clear the display before starting the calculation. When the [AC] key 11a is operated (Step A1: Yes), the CPU 21 clears each memory area of the memory 22. Further, the CPU 21 sets the calculation mode to a calculation registration mode for recording calculation data of normal calculation or tax calculation. That is, the CPU 21 records the mode data indicating the calculation registration mode in the calculation mode area 22r, and turns off the review symbols in the status display area of the display unit 12. In the initial state, the number of steps 12a displayed in the state display area of the display unit 12 is set to [000] (step A2).

  First, a case where a normal calculation such as the four arithmetic calculations is performed will be described.

  When the user operates a numerical key to input a numerical value to be calculated (step A3: Yes), the CPU 21 inputs numerical data corresponding to the input numerical value key and stores the numerical data in the buffer memory area 22n. Remember. Further, the CPU 21 updates (+1) the number of steps 12a, and changes the number of steps 12a in the status display area of the display unit 12. Further, the CPU 21 stores the input numerical value (numeric value) in the display memory area 22p and causes the display unit 12 to display the numerical value (step A4).

  Subsequently, when the calculation function keys 11h1 to 11h4 other than the [=] key 11h0 are operated (step A5: Yes), the CPU 21 inputs calculation data (key code) corresponding to the input operation function key. Then, it is stored in the buffer memory area 22n, and an operation (symbol) symbol is displayed in the status display area of the display unit 12 as a function symbol corresponding to the input operation data (step A6).

  In the calculation registration mode, the CPU 21 registers, in the calculation data storage area 22s, the display numerical value before the operation key operation (the numerical data and the operation data stored in the buffer memory area 22n) in association with the current number of steps. The number of steps is increased by 1 to input the next calculation data (step A12). The CPU 21 executes the calculation based on the input calculation data and the input numerical data, and displays the result of the calculation on the display unit 12 (step A13).

  Hereinafter, similarly, by repeatedly inputting the numerical data and the calculation data, the CPU 21 sequentially records the input numerical data and the calculation data in the calculation data storage area 22s while updating the number of steps. (Steps A1 to A6, A12, A13).

  Then, when the [=] key 11h0 is operated by a user operation (step A7: Yes), the CPU 21 responds to the operated function key (“=” key 11h0) by the input operation, and the numerical value input so far. The calculation according to the data and the calculation data is executed, and the calculation result is displayed on the display unit 12 (step A8). Further, the CPU 21 registers the display values (numerical data and operation data) stored in the buffer memory area 22n before the operation of the “=” key 11h0 in the calculation data storage area 22s in association with the current number of steps. In order to input the next calculation data, the number of steps 12a is increased by 1 (step A9).

  Further, the CPU 21 registers the calculation result data indicating the numerical value displayed on the display unit 12 after the operation of the “=” key 11h0 in the target step of the calculation data storage area 22s, and executes the step for the next input. The number is increased by 1 (step A15).

  Next, the case of calculating a tax will be described.

  When the [AC] key 11a is operated (Step A1: Yes), the CPU 21 clears each memory area of the memory 22. Therefore, the tax total memory areas 22b to 22f for each tax rate, the tax total memory area 22g, the total memory area 22h, the buffer memory area 22n, and the display memory area 22p of the memory 22 used for the tax calculation are all cleared.

  The tax calculation is operated by operating any of the tax calculation keys 11b (tax n calculation keys 11b0 to 11b4) for which the tax rates 0 to 4 are set for the previously input numerical values. Execute tax calculation (calculation including tax or calculation without tax) according to the tax rate according to the key.

  The tax calculation key 11b (tax n calculation key 11b0 to 11b4) serves as both a key for performing the tax-inclusive calculation and a key for performing the tax-excluded calculation, so that it depends on the tax calculation mode when operated. Perform tax-in or tax-out calculations.

  The tax calculation mode is switched by operating the tax calculation mode switching key 11d. When detecting the operation of the tax calculation mode switching key 11d (step A10: Yes), the CPU 21 refers to the tax calculation mode area 22m to determine whether the current tax calculation mode is the tax-inclusive calculation mode or the tax-excluding calculation mode. Determine if there is.

  Here, when the current tax calculation mode is the tax-inclusive calculation mode (step A16: including tax), the CPU 21 stores the tax-calculation mode data indicating the tax-excluding calculation mode in the tax calculation mode area 22m (step A17). Further, the CPU 21 displays a tax calculation mode symbol 12b ([TAX-]) indicating the tax-excluding calculation mode in the status display area of the display unit 12 (step A19).

  On the other hand, when the current tax calculation mode is the tax-excluding calculation mode (step A113, excluding tax), the CPU 21 stores the tax calculation mode data indicating the tax-inclusive calculation mode in the tax calculation mode area 22m (step A115). Further, the CPU 21 displays the tax calculation mode symbol 12b ([GST +]) indicating the tax-inclusive calculation mode in the status display area of the display unit 12 (step A116).

  Next, when the user operates a numerical key to input a numerical value to be calculated (step A3: Yes), the CPU 21 inputs a numerical value (numerical code) corresponding to the input numerical key. Then, it is stored in the buffer memory area 22n. Further, the CPU 21 updates (+1) the number of steps 12a to change the number of steps 12a in the status display area, stores the input numerical value in the display memory area 22p, and causes the display unit 12 to display the numerical value (step A4). ).

  When the input operation of the tax calculation key 11b is detected in the state where the numerical value is displayed on the display unit 12 (step A110: Yes), the CPU 21 calculates the operation data (key code of the key) corresponding to the input operation of the tax calculation key 11b. ) Is input and stored in the buffer memory area 22n.

  When the tax calculation key 11b is operated, the CPU 21 refers to the tax calculation mode area 22m to determine whether the current tax calculation mode is the tax-inclusive calculation mode or the tax-excluding calculation mode. Here, when the current tax calculation mode is the tax-inclusive calculation mode (step A111: including tax), the CPU 21 executes a tax-inclusive calculation process (step A112).

  In the tax-inclusive calculation process, the CPU 21 inputs the tax n calculation keys 11b0 to 11b4 for which the input operation has been performed on the numerical value (numeric value) displayed on the display unit 12, that is, the numerical value stored in the display memory area 22p. The tax-inclusive calculation is performed using the tax rate set to any of the above.

  In addition, the CPU 21 displays the calculation result of the tax-inclusive calculation (here, the tax-inclusive amount) on the display unit 12, and assigns it to the tax n-calculation keys 11 b 0 to 11 b 4 as a tax calculation key symbol 12 c in the state display area of the display unit 12. A function symbol (tax included calculation symbol) indicating that the tax included calculation function has been executed is displayed. Here, the tax calculation key symbol 12c corresponds to any of the tax n calculation keys 11b0 to 11b4 operated for the calculation including tax, [GST + 0], [GST + 1], [GST + 2], [GST + 3], [GST + 4]. ] Is displayed. The details of the tax-inclusive calculation process will be described later (see FIG. 5).

  On the other hand, if the current tax calculation mode is the tax-excluding calculation mode (step A111: tax-excluded), the CPU 21 executes a tax-excluded calculation process (step A113).

  In the tax exclusion calculation process, the CPU 21 performs a tax n calculation key 11b0 on which an input operation is performed on the numerical value (numeric value) displayed on the display unit 12, that is, the numerical value stored in the display memory area 22p. The tax exclusion calculation is performed using the tax rate set to any of 11b4.

  In addition, the CPU 21 displays the calculation result of the tax exclusion calculation (here, the tax exclusion amount) on the display unit 12 and, in the state display area of the display unit 12, as the tax calculation key symbol 12c, the tax n calculation keys 11b0 to 11b4. A function symbol (excluding tax calculation symbol) indicating that the tax excluding calculation function assigned to is executed. Here, the tax calculation key symbol 12c corresponds to any of the tax n calculation keys 11b0 to 11b4 operated for the tax exclusion calculation, [TAX-0], [TAX-1], [TAX-2]. , [TAX-3], or [TAX-4] is displayed.

  Next, the tax-inclusive calculation processing in the present embodiment will be described with reference to the flowchart shown in FIG. Here, a tax rate 1 calculation process executed when the tax 1 calculation key 11b1 is operated to perform a tax-inclusive calculation will be described as an example. Similarly, when the tax-inclusive calculation is instructed by operating the tax 0 calculation key 11b0, the tax 2 calculation key 11b2, the tax 3 calculation key 11b3, and the tax 4 calculation key 11b4, the tax rate 0 calculation processing, the tax rate 1 calculation processing, the tax rate 2 The detailed description is omitted assuming that the calculation process, the tax rate 3 calculation process, and the tax rate 4 calculation process are respectively performed.

  When starting the tax rate 1 calculation process in response to the input operation of the tax 1 calculation key 11b1, the CPU 21 determines whether the current tax total recall mode is in the off state or not by referring to the tax total recall mode area 22k. The total tax recall mode is turned on by operating the total tax key 11c.

  Here, when the tax total recall mode is in the off state (step B21: Yes), the CPU 21 reads the numerical value (numeric value) stored in the display memory area 22p, and sets the read numerical value as the tax-excluded amount. The tax-inclusive amount and the tax amount are calculated based on the tax-excluded amount and the tax rate 1 (“5%”) which is the tax rate according to the tax calculation key 11b on which the input operation is performed, and the calculated tax-inclusive amount and tax amount are calculated. Is stored in the tax rate 1 total memory area 22c (step B22). Further, the CPU 21 stores the numerical value used for the tax-inclusive calculation stored in the display memory area 22p in the buffer memory area 22n, and stores the numerical value of the tax-inclusive amount calculated based on the tax rate 1 in the display memory area 22p. (Step B23). Further, the CPU 21 causes the display unit 12 to display the tax-inclusive amount calculated based on the tax rate 1 (step B24). In addition, the CPU 21 executes a verification memory registration process in accordance with the operation of the tax calculation key 11b (step B50).

  FIG. 6 is a flowchart illustrating a verification memory registration process according to the present embodiment. The CPU 21 displays the numerical value after the operation of the tax calculation key 11b and key information indicating whether the tax calculation key 11b has been operated to execute either the tax-inclusive calculation (GST + n) or the tax-excluding calculation (TAX-n). ([GST + n] or [TAX-]) is stored in the calculation data storage area 22s (checking memory) in association with the current number of steps (step D1). Here, a tax-inclusive calculation mode is set in the tax calculation mode area 22m, and the tax calculation key 11b is operated to execute the tax-inclusive calculation. Therefore, the CPU 21 registers the key information ([GST + n]) and the display numerical value in association with each other. The CPU 21 increases the number of steps by 1 to input the next calculation data (step D2).

  If the step B22 has been executed one or more times before the step B22 is executed this time after the last input operation of the [AC] key 11a, the previously executed one or more times is executed. The tax-excluded amount or the total amount, the tax-inclusive amount or the total amount, the tax amount or the total amount calculated in step B22 are already stored in the tax rate 1 total memory area 22c before executing step B22 this time. Will be. Therefore, when the step B22 is executed, if the tax-excluded amount or the total amount, the tax-inclusive amount or the total amount, the tax amount or the total amount are already stored in the tax rate 1 total memory area 22c, the tax-exclusive amount or the total amount is stored. Add the tax-excluded amount, tax-inclusive amount, and tax amount calculated when step B22 is executed this time to the tax-excluded amount or the total amount, the tax-inclusive amount or the total amount, and the tax amount or the total amount, respectively. . As described above, in the tax rate 1 total memory area 22c, the tax exemption obtained by one or more tax inclusive calculations of all tax rates 1 (step B22) executed after the last input operation of the [AC] key 11a. The sum of the amount, the tax-inclusive amount, and the tax amount is stored.

  In this way, the CPU 21 can continuously instruct the tax-inclusive calculation for a plurality of numerical values (numbers) according to the input operation on the tax 1 calculation key 11b1.

  In the state where the tax-included amount is displayed, the display of the tax-inclusive amount, the tax-excluded amount, and the tax amount can be switched by continuously operating the tax 1 calculation key 11b1 operated to instruct the tax calculation. . For example, when the tax-inclusive amount calculated based on the tax rate 1 is displayed (step B24), if the tax 1 calculation key 11b1 is operated (step B25: Yes), the CPU 21 stores it in the buffer memory area 22n. The read numerical value (number) is read out and displayed as the tax-excluded amount (step B26).

  As described above, at this time, that is, immediately after the tax-inclusive calculation (immediately after executing steps B22 and B23), the value of the tax-excluded amount used in the tax-inclusive calculation is stored in the buffer memory area 22n.

  In response to the operation of the tax 1 calculation key 11b1, the CPU 21 executes the verification memory registration process shown in FIG. 6 in the same manner as described above, and associates the currently displayed numerical value with the key information ([GST + n]). It is registered in the storage area 22s, and the number of steps is increased by 1 (step B51).

  When the tax-excluded amount is displayed (step B26), if the tax-one calculation key 11b1 is operated (step B27: Yes), the CPU 21 sets the numerical value (tax-excluded amount) stored in the buffer memory area 22n. ) Is read out, the tax amount is calculated again based on the read out numerical value and the tax rate 1, and the numerical value is displayed on the display unit 12 (step B28). Similarly, the CPU 21 executes a verification memory registration process shown in FIG. 6 (detailed description is omitted) (step B52).

  Further, when the tax 1 calculation key 11b1 is continuously operated (step B29: Yes), the CPU 21 reads out the numerical value (excluding tax) stored in the buffer memory area 22n, and reads the read numerical value and the tax rate 1. The tax-inclusive amount is calculated again based on the calculated value, and the numerical value is displayed on the display unit 12 (step B24). Similarly, the CPU 21 executes a verification memory registration process shown in FIG. 6 (detailed description is omitted) (step B50).

  In this way, the calculator 10 calculates the tax-inclusive amount in accordance with the operation of the tax-one calculation key 11b1, and then displays each of the tax-inclusive amount, the tax-excluded amount, and the tax amount for each operation on the tax-one calculation key 11b1. , Can be switched and displayed. Therefore, the tax-inclusive amount, the tax-excluded amount, and the tax amount can be easily confirmed.

  In addition to not only the calculation data indicating the contents of the tax-inclusive calculation, but also the operation of switching the display of the tax-included amount, the tax-excluded amount, and the tax amount using the tax-one calculation key 11b1, the operation according to the operation of the tax-one calculation key 11b1 The display numerical value indicating the content and the key information ([GST + n]) indicating the function of the tax 1 calculation key 11b1 corresponding to the tax calculation mode can be registered in the calculation data storage area 22s.

  On the other hand, when the tax total recall mode is on (step B21: No), the CPU 21 stores the first tax-included total amount indicating the total of the tax-inclusive amount calculated based on the tax rate 1 for at least one numerical value, in the tax rate 1 total memory. The data is read from the area 22c and displayed on the display unit 12 (step B30).

  When the tax total recall mode is in the ON state, the CPU 21 performs the verification memory registration process shown in FIG. (Detailed description is omitted) (step B53).

  Further, when the tax 1 calculation key 11b1 is operated in the state where the first tax-included total amount is displayed (step B31, Yes), the CPU 21 corresponds to the first tax-included total amount from the tax rate 1 total memory area 22c. The first total tax-excluded amount (total tax-excluded amount) is read out and displayed (step B32). Similarly, the CPU 21 executes a verification memory registration process shown in FIG. 6 (detailed description is omitted) (step B54).

  Further, when the first tax exemption amount is displayed and the tax 1 calculation key 11b1 is operated (step B33: Yes), the CPU 21 determines from the tax rate 1 total memory area 22c the first tax-included total amount. One tax total amount (total tax amount) is read and displayed (step B34). Furthermore, when the tax 1 calculation key 11b1 is operated in the state where the first tax total amount is displayed (step B35: Yes), the CPU 21 reads out and displays the first tax total total amount from the tax rate 1 total memory area 22c. (Step B30). Similarly, the CPU 21 executes a verification memory registration process shown in FIG. 6 (detailed description is omitted) (step B55).

  That is, when the tax total recall mode is on, the calculator 10 displays the first total tax-included amount, the first total tax-excluded total amount, and the first tax-exclusive amount calculated based on the tax rate 1 for each operation on the tax 1 calculation key 11b1. The display of the total amount can be sequentially switched. Therefore, after the tax calculation for a plurality of numerical values at the tax rate 1, the first tax total amount, the first tax-excluded total amount, and the first tax total amount can be easily calculated as a result of the multiple tax calculations using the tax rate 1. Can be confirmed.

  Also, when the tax total recall mode is on, the tax 1 calculation key 11b1 is also used to switch the display of the first tax-included total amount, the first tax-excluded total amount, and the first tax total amount. In accordance with the operation of 11b1, the display numerical value indicating the operation content and the key information ([GST + n] or [TAX-]) indicating the function of the tax 1 calculation key 11b1 corresponding to the tax calculation mode are registered in the calculation data storage area 22s. can do.

  When the tax total recall mode is on (step B21: No), the CPU 21 detects that any of the plurality of tax calculation keys 11b (11b0 to 11b4) has been operated (step B31: No). , Step B33: No, Step B35: No), the process proceeds to the calculation process corresponding to the operated tax calculation key 11b (Steps B36 to B39), and the same processes as those in Steps B21 to B35 described above are executed.

  For example, when it is detected that the tax 0 calculation key 11b0 has been operated in a state where any of the first total tax-included amount, the first total tax-excluded total amount, and the first tax total amount is displayed (step B31: No, (Step B33: No, Step B35: No → Step B36: Yes), the CPU 21 shifts to a tax rate 0 calculation process. In this case, since the tax total recall mode is in the ON state, the CPU 21 reads out the 0th tax-included total amount (the total amount including tax at the tax rate 0) from the tax rate 0 total memory area 22b and displays the same as in step B30 described above. When the tax 0 calculation key 11b1 is operated in a state where the 0th tax-included total amount is displayed, similarly to step B32 described above, the CPU 21 reads the 0th tax-excluded total amount (tax rate 0) from the tax rate 1 total memory area 22c. Of the tax excl.) Is displayed. Further, when the tax 0 calculation key 11b0 is operated in a state in which the 0th tax-excluded total amount is displayed, the CPU 21 reads the 0th tax total amount (tax rate 0) from the tax rate 0 total memory area 22b as in the above-described step B34. The total amount of tax is read out and displayed.

  Similarly, when it is detected that the tax 2 calculation key 11b2 is operated (step B37: Yes), the CPU 21 shifts to the tax rate 2 calculation process and executes the same process as described above. When the CPU 21 detects that the tax 3 calculation key 11b3 has been operated (step B38: Yes), the CPU 21 shifts to the tax rate 3 calculation process and detects that the tax 4 calculation key 11b4 has been operated. (Step B27: Yes), the processing shifts to the tax rate 4 calculation processing, and the same processing as described above is executed. If it is detected that the tax calculation total key 11c has been operated (step B40: Yes), the CPU 21 displays the total tax-included amount, the total tax-excluded amount, and the total tax amount calculated at each tax rate. (Steps A29 to A214 described later). If the CPU 21 has not detected that the tax calculation total key 11c has been operated (step B40: No), the CPU 21 returns to the standby state for the input operation.

  In the tax rate 0 calculation processing, the tax rate 2 calculation processing, the tax rate 3 calculation processing, and the tax rate 4 calculation processing, when the tax 1 calculation key 11b1 is operated when the tax total recall mode is in the ON state, Similarly, the process proceeds to the tax rate 1 calculation process.

  In each of the calculation processes of the tax rates 0 to 4, the tax calculation keys 11b corresponding to the other tax rates are operated while the tax total recall mode is in the ON state, thereby corresponding to the operated tax calculation keys 11b. By shifting to another calculation process, the total tax-included amount, the total tax-excluded amount, and the total tax amount calculated based on the tax rate corresponding to the other calculation process can be displayed.

  Therefore, when the tax total recall mode is in the ON state, by selecting one of the plurality of tax calculation keys 11b (11b0 to 11b4), the calculation is performed based on the tax rate corresponding to the operated tax calculation key 11b. , The total amount including tax, the total amount without tax, and the total amount of tax can be easily checked.

  Next, the tax exclusion calculation processing in the present embodiment will be described with reference to the flowchart shown in FIG. Here, a case where the tax 1 calculation key 11b1 is operated will be described. When the tax 0 calculation key 11b0, the tax 2 calculation key 11b2, the tax 3 calculation key 11b3, and the tax 4 calculation key 11b4 are operated, the same processing as when the tax 1 calculation key 11b1 is operated is executed. Detailed description is omitted.

  When the CPU 21 detects that the tax 1 calculation key 11b1 has been operated, the CPU 21 reads a numerical value (numeric value) stored in the display memory area 22p, and uses the read numerical value as a tax-inclusive amount. Based on the tax rate 1 (“5%”), which is the tax rate corresponding to the tax calculation key 11b on which the input operation has been performed, the tax-excluded amount is calculated (step C1). The CPU 21 stores the numerical value used for the tax exclusion calculation stored in the display memory area 22p in the buffer memory area 22n, and stores the numerical value of the tax exclusion amount calculated based on the tax rate 1 in the display memory area 22p. It is stored (step C2). Further, the CPU 21 causes the display unit 12 to display the tax-excluded amount calculated based on the tax rate 1 (step C3).

  Further, the CPU 21 executes the verification memory registration process shown in FIG. 6 in accordance with the operation of the tax calculation key 11b in the same manner as in the case of the tax-inclusive calculation described above (step C10). Here, a tax-excluding calculation mode is set in the tax calculation mode area 22m, and the tax calculation key 11b is operated to execute the tax-excluding calculation. Accordingly, the CPU 21 registers the key information ([TAX-]) and the display value in association with each other by the verification memory registration process. The CPU 21 increases the number of steps by 1 to input the next calculation data.

  In the state where the tax-excluded amount is displayed, the display of the tax-excluded amount and the tax amount can be switched by continuously operating the tax 1 calculation key 11b1 operated to instruct the tax calculation. For example, when the tax-excluded amount calculated based on the tax rate 1 is displayed (step C3), and the tax 1 calculation key 11b1 is operated (step C4: Yes), the CPU 21 stores the data in the buffer memory area 22n. The stored numerical value (tax included) is read out, the tax amount is newly calculated based on the read numerical value and the tax rate 1, and the numerical value is displayed on the display unit 12 (step C5). Similarly, the CPU 21 executes the verification memory registration process shown in FIG. 6 (detailed description is omitted) (step C11).

  Further, when the tax 1 calculation key 11b1 is continuously operated (step C6: Yes), the CPU 21 reads out the numerical value (tax-excluded amount) stored in the buffer memory area 22n, and displays the read numerical value on the display unit 12. It is displayed (step C3). Similarly, the CPU 21 executes a verification memory registration process shown in FIG. 6 (detailed description is omitted) (step C10).

  In this way, after calculating the tax-excluded amount in accordance with the operation of the tax-one calculation key 11b1, the calculator 10 alternately switches the display of the tax-excluded amount and the tax amount for each operation on the tax-one calculation key 11b1. Can be displayed. Therefore, the tax-excluded amount and the tax amount can be easily confirmed.

In addition to not only the calculation data indicating the contents of the tax exemption calculation but also the operation of switching the display of the tax exemption amount and the tax amount by the tax 1 calculation key 11b1, the operation content is changed according to the operation of the tax 1 calculation key 11b1. The displayed numerical value and the key information ([TAX-]) indicating the function of the tax 1 calculation key 11b1 corresponding to the tax calculation mode can be registered in the calculation data storage area 22s.
In the tax exclusion calculation process, even if an operation is performed on the tax 1 calculation key 11b1, the tax-inclusive amount is not displayed. In the tax-inclusive calculation processing, the calculation result calculated according to the operation on the tax calculation key 11b is reflected (added) to the tax rate 1 total memory area 22c. In the tax-excluded calculation processing, the calculation result is calculated in the tax rate 1 total memory area 22c. Do not reflect on.

Next, processing according to the input operation on the tax calculation total key ([GST GT (GT)]) 11c in the present embodiment will be described with reference to the flowchart shown in FIG.
The tax calculation total key 11c includes a grand total key ([GT] key) for displaying a total total for the normal calculation (basic calculation) and a GST grand total key (for displaying the total total for the calculation result of the tax calculation). [GST GT] key).

  The CPU 21 determines whether the operation immediately before the tax calculation total key 11c is pressed is a tax calculation. That is, the CPU 21 determines whether the tax calculation total key 11c has been operated immediately after the tax calculation in accordance with the operation of the tax calculation key 11b, in other words, whether the tax calculation total key 11c has been operated following the operation of the tax calculation key 11b. Is determined.

  Here, when it is determined that the tax calculation total key 11c has been operated immediately after the tax calculation (step A26: Yes), the CPU 21 turns on the tax total recall mode stored in the tax total recall mode area 22k (step A28). ). That is, the tax calculation total key 11c operated immediately after the tax calculation is used as a GST grand total key ([GST GT] key) for displaying a total sum of the calculation results of the tax calculation.

  In this case, the CPU 21 calculates the total amount based on the tax-inclusive amount, the tax-excluded total amount, and the tax-inclusive amount calculated based on each of the tax rates 0 to 4 stored in the tax total tax-specific memory areas 22b to 22f. The calculated total amount including tax, total amount excluding tax, and total amount of tax are calculated and stored in the total tax memory area 22g. In addition, the CPU 21 stores the calculated total sum including tax in the display memory area 22p and causes the display unit 12 to display the total sum (step A29).

  When the tax total sum is displayed (step A29), if the tax calculation total key 11c is operated (step A210: Yes), the CPU 21 reads out the tax total sum from the tax total memory area 22g, The information is stored in the display memory area 22p and displayed on the display unit 12 in place of the total sum including tax (step A211).

  Furthermore, when the tax total sum is displayed (step A211), if the tax calculation total key 11c is operated (step A212, Yes), the CPU 21 reads the tax total total from the tax total memory area 22g. Then, it is stored in the display memory area 22p and displayed on the display unit 12 in place of the total tax-excluded total amount (step A213).

  Further, when the total tax amount is displayed (step A213), if the total tax calculation key 11c is operated (step A214: Yes), the CPU 21 reads out the total total amount including tax from the total tax memory area 22g. Are stored in the display memory area 22p and displayed on the display unit 12 instead of the total tax amount (step A29).

  That is, the calculator 10 in the present embodiment calculates the total tax-included total in accordance with the operation of the tax calculation total key 11c, and corresponds to the total tax-included total and the total tax-included total for each operation on the tax calculation total key 11c. The display can be sequentially switched to the total amount excluding tax and the total amount corresponding to the total amount including tax. Therefore, it is possible to easily confirm the total amount including tax, the total amount excluding tax, and the total amount including tax.

  On the other hand, when the CPU 21 determines that the operation immediately before the tax calculation total key 11c is pressed is not the tax calculation, that is, the tax calculation total key 11c is operated immediately after the normal calculation (step A26: No), the total memory area The numerical value as a result of the normal calculation stored in 22h is read out, stored in the display memory area 22p, and displayed on the display unit 12 (step A27). That is, the tax calculation total key 11c operated immediately after the normal calculation is used as a grand total key ([GT] key) for displaying the total sum calculated by the normal calculation.

  Thus, in the calculator 10 according to the present embodiment, one tax calculation total key 11c is provided on the front of the housing having a limited area, and a grand total key ([GT] key) and a GST grand total key ([GST GT] key) ). The function of the tax calculation total key 11c is switched according to the state immediately before (immediately after tax calculation, immediately after normal calculation), so that the tax calculation total sum (tax total sum, tax-excluded total sum, tax total amount) The total sum of the ordinary calculations can be easily displayed.

Next, processing in the confirmation (review) mode of the calculator 10 in the present embodiment will be described with reference to FIG.
After setting the calculation mode to the calculation registration mode in response to the operation of the [AC] key 11a (step A2: Yes), the CPU 21 operates the confirmation key ([CHECK BACK] key 11e or [CHECK FWARD] key 11f). Then (FIG. 5, step A30: Yes), the calculation mode is set to the confirmation mode. The check mode is for checking the contents of the previously executed calculation, and the calculation contents indicated by the calculation data registered in the calculation data storage area 22s (checking memory) can be corrected while checking in steps. Mode.

  When the calculation mode is set to the check mode, the CPU 21 displays a check mode symbol 12g (“REV” symbol) indicating that the calculation mode is in the check mode in the state display area of the display unit 12. The CPU 21 sets the number of steps indicating the designated row in which the numerical data to be checked and the operation data are stored to the initial value [001] (step A31).

  The CPU 21 reads out the numerical data and the calculation data (function) recorded in the step of the designated row in the calculation data storage area 22s (step A32). First, a case will be described in which calculation data registered by normal calculation is targeted.

  If the calculation data read from the calculation data storage area 22s is not a code indicating the tax calculation key 11b, that is, if the calculation data is not a code indicating a key to which a plurality of functions are assigned to one key (Step A33: No). The numerical value indicated by the numerical data and the operation symbol indicated by the operation data are displayed on the display unit 12 (step A37).

  Here, when the [CHECK BACK] key 11e or the [CHECK FORWARD] key 11f is operated (Step A40: No, Step A41: Yes), the CPU 21 updates the designated number of steps (Step A42) and updates the number. The numerical data and operation data of the subsequent step number are read out, and the numerical values and operation symbols are displayed on the display unit 12 (steps A32 and A37). That is, when the [CHECK BACK] key 11e is operated, the CPU 21 displays the numerical data and the operation symbol input immediately before the currently displayed numerical value, and when the [CHECK FWARD] key 11f is operated. Displays the numerical value and the operation symbol input immediately after the numerical value currently displayed.

  Thus, the user operates the [CHECK BACK] key 11e or the [CHECK FWARD] key 11f to sequentially read out a set of numerical data and calculation data included in the calculation data registered during the normal calculation, and Can be displayed on the display unit 12 for confirmation (steps A32, A37, A41, A42).

  Next, a case in which calculation data registered by tax calculation is targeted will be described. If the calculation data read from the calculation data storage area 22s is a code indicating the tax calculation key 11b (Step A33: Yes), the CPU 21 adds the key information (extended information) to the set of the numerical data and the calculation data. ), It is determined which of the tax-inclusive calculation and the tax-exclusive calculation has been executed by operating the tax calculation key 11b.

  When the key information indicates the tax-inclusive calculation ([GST +]) (step A34: tax-inclusive), the CPU 21 displays the numerical value indicated by the numerical data and the tax calculation key symbol 12c indicating the tax-inclusive calculation according to the key information on the display unit 12. (Step A35). As the function symbol displayed here, for example, the same [GST +] as the symbol indicating the tax-inclusive calculation mode is used. Similarly, when the key information indicates the tax-exempt calculation ([TAX-]) (step A34: tax-excluded), the CPU 21 changes the numerical value indicated by the numerical data and the function symbol indicating the tax-exempt calculation according to the key information. It is displayed on the display unit 12 (step A36). As the function symbol displayed here, for example, the same [TAX-] as the symbol indicating the tax-excluding calculation mode of the tax calculation mode symbol 12b is used.

  That is, when the code of the tax calculation key 11b is registered as the calculation data of the calculation data, the CPU 21 corresponds to the tax calculation key 11b operated for the tax calculation (the tax n calculation keys 11b0 to 11b4). Instead of a symbol to be displayed, a function symbol representing a tax-inclusive calculation function or a tax-excluding calculation function executed by operating the tax calculation key 11b is displayed. Thereby, the user can easily confirm which of the two functions of the tax-inclusive calculation and the tax-exclusive calculation assigned to the tax calculation key 11b has been executed.

  Here, when the [CHECK BACK] key 11e or the [CHECK FWARD] key 11f is operated (step A40: No, step A41: Yes), the CPU 21 updates the designated number of steps (step A42), and Similarly, the numerical data and the operation data of the updated step number and the key information are read out, and the function symbol representing the tax-inclusive calculation function or the tax-excluding calculation function is displayed on the display unit 12 together with the numerical value (step A32, A37). That is, when the [CHECK BACK] key 11e is operated, the CPU 21 displays the numerical data input immediately before the currently displayed numerical value and the function symbol indicating the calculation including tax or the calculation without tax, and displays the [CHECK] When the [FORWARD] key 11f is operated, the numerical value input immediately after the numerical value currently displayed and the function symbol indicating the calculation including tax or the calculation without tax are displayed.

  In this way, the user operates the [CHECK BACK] key 11e or the [CHECK FWARD] key 11f to set a set of numerical data and operation data included in the calculation data registered at the time of the tax calculation, and further, to the numerical data and operation data. The key information added to the set is sequentially read out, and the contents of the calculation process can be displayed on the display unit 12 for confirmation (steps A32, A37, A41, A42).

  Next, a case where the calculation content displayed in the confirmation mode is corrected will be described.

  As described above, when the correction key 11k is operated in a state where the numerical value to be corrected is displayed by operating the [CHECK BACK] key 11e or the [CHECK FWARD] key 11f (step A40: Yes), the CPU 21 , And a correction symbol (not shown) indicating that the device is in the correction mode is displayed in the status display area of the display unit 12.

  Here, when the numeric key is operated (step A43: Yes), the CPU 21 inputs the numerical data corresponding to the input operated numeric key, and causes the display unit 12 to display a numerical value indicating the input numerical data. (Step A44). Subsequently, when the operation key is operated (Step A45: Yes), the CPU 21 inputs the operation data corresponding to the operation key that has been input, and displays the operation symbol of the input operation data in the state of the display unit 12. Display in the display area.

  Further, when the correction key 11k is operated (step A59: Yes), the CPU 21 determines that the input of the data for correction is completed by the user. The CPU 21 inputs the data being displayed (the numerical value and the operator input immediately before) stored in the calculation mode area 22n as correct data after correction, and executes the target step of the registered calculation data in the calculation data storage area 22s. (Step A47). The CPU 21 causes the display unit 12 to display the calculation result of the calculation data including the corrected numerical data and the calculation data.

  On the other hand, following the input of the numerical data (step A43: Yes, A44), when the tax calculation key 11b is operated (step A50: Yes), the CPU 21 refers to the tax calculation mode area 22m to determine the current tax. It is determined whether the calculation mode is the tax-inclusive calculation mode or the tax-excluding calculation mode. If the current tax calculation mode is the tax-inclusive calculation mode (step A51; tax-inclusive), the CPU 21 displays the total sum display symbol 12e (tax-inclusive calculation symbol) corresponding to the operated tax calculation key 11b (step A52).

  Further, when the correction key 11k is operated (step A53: Yes), the CPU 21 determines that the completion of the input of the data for the correction is instructed. The CPU 21 inputs the data being displayed (the numerical value and the tax calculation key symbol 12c input immediately before) stored in the calculation mode area 22n as correct data after correction from the calculation mode area 22n. The data is corrected as data of the target step (step A47). Here, key information indicating a tax-inclusive calculation is added to a set of the corrected numerical data and operation data (function) indicating the tax calculation key 11b. The CPU 21 causes the display unit 12 to display the calculation result of the calculation data including the corrected numerical data and the calculation data.

  Similarly, when the current tax calculation mode is the tax-excluding calculation mode (step A51; tax-excluded), the CPU 21 displays a tax-excluded calculation symbol corresponding to the operated tax calculation key 11b (step A54).

  Further, when the correction key 11k is operated (Step A55: Yes), the CPU 21 determines that the input of the data for the correction has been instructed. The CPU 21 inputs the display data (the numerical value and the tax calculation key symbol 12c input immediately before) from the calculation mode area 22n as correct data after correction, and corrects the data as the data of the target step of the registered calculation data (step A47). ). Here, key information indicating a tax-excluded calculation is added to the corrected set of numerical data and operation data (function). The CPU 21 causes the display unit 12 to display the calculation result of the calculation data including the corrected numerical data and the calculation data.

  In this way, the confirmation (review) function can read and modify an arbitrary numerical value from the registered calculation data. The user can make corrections as necessary while checking the contents of the calculation data. In particular, when checking the contents of tax calculation, it is easy to check whether the tax-inclusive calculation or the tax-exclusive calculation is being performed. Can be implemented.

  Next, a specific tax calculation and a display example of calculation contents in the confirmation mode in the present embodiment will be described. Here, in order to facilitate understanding of a method of registering key information (extended information) in calculation data at the time of tax calculation using the tax calculation key 11b by the calculator 10 of the present embodiment, a case where key information is not registered in calculation data will be described. A comparison will be described.

  First, a case where key information (extended information) is not registered in calculation data will be described.

  FIG. 10 shows specific key operations used in the following description, the number of steps and numerical values displayed on the display unit 12, function symbols displayed according to the key operations, and mode symbols indicating the operation state of the calculator 10. ing. The key operation shown in FIG. 10 is an example of an operation for confirming the calculation contents of the tax calculation by operating the [CHECK FWARD] key 11f after executing the tax calculation. Note that, in the key operation in FIG. 10, the operation of the [CHECK FWARD] key 11f is represented by “▽” for convenience. In addition, the tax rate 3 set for the tax 3 calculation key 11b3 ([GST + 3 (TAX-3)]) is set to “10%”.

  FIG. 11 is a diagram showing an example of calculation data registered in the calculation data storage area 22s by a key operation for tax calculation shown in FIG.

  When the [AC] key 11a is operated, the CPU 21 clears the tax rate-based total tax memory areas 22b to 22f. Further, the CPU 21 refers to the tax calculation mode area 22m and displays the current tax calculation mode including the tax-inclusive calculation mode [GST +] as the tax calculation mode symbol 12b in the status display area of the display unit 12 (see FIG. 10). 1st line).

  Thereafter, when the numerical value “300” is input by operating the numerical keys for the calculation including tax, the CPU 21 stores the input numerical value in the display memory area 22p and causes the display unit 12 to display the input numerical value. At this time, the CPU 21 displays the initial value “001” for the number of steps 12a (the second line in FIG. 10). Next, when the tax 3 calculation key 11b3 is operated, as shown in FIG. 11, the CPU 21 calculates the step “001”, the numerical value “300”, and the calculation data (code [GST + 3 / TAX-3]) is registered in the calculation data storage area 22s in association with each other.

  The CPU 21 calculates the tax-inclusive amount “330” based on the input numerical value “300” and the tax rate 3 (here, 10%) corresponding to the tax 3 calculation key 11b3, and calculates the numerical value “330” and the tax 3 calculation key. “GST + 3” is displayed on the display unit 12 as the tax calculation key symbol 12c corresponding to 11b3. The CPU 21 displays “002” in the step number 12a (third line in FIG. 10). Further, the CPU 21 stores the result of the tax calculation using the tax rate 3 with the tax 3 calculation key 11b3 in the tax rate 3 total memory area 22e.

  Here, when it is detected that the tax 3 calculation key 11b3 has been operated in a state where the tax-inclusive amount “330” is displayed on the display unit 12, as shown in FIG. 330 ", the operation data (code [GST + 3 / TAX-3]) corresponding one-to-one to the tax 3 calculation key 11b3 is registered in the calculation data storage area 22s. In addition, the CPU 21 causes the display unit 12 to display the tax-excluded amount “300” instead of the tax-inclusive amount “330” in response to the operation of the tax 3 calculation key 11b3. The CPU 21 displays “003” in the step number 12a (the fourth line in FIG. 10).

  Next, it is assumed that the tax calculation mode switching key 11d has been operated to change the tax calculation mode from the calculation including tax to the calculation without tax. As shown in FIG. 11, the CPU 21 associates the step “003” with the numerical value “300” and registers it in the calculation data storage area 22s. The tax calculation mode switching key 11d is not a key for instructing a calculation for the displayed value "300" (display of calculation result). For this reason, the CPU 21 does not register a function (computation data) corresponding to the numerical value “300” one-to-one in the calculation data storage area 22s.

  The CPU 21 displays [TAX-] on the display unit 12 as the tax calculation mode symbol 12b in response to the operation of the tax calculation mode switching key 11d. The CPU 21 displays “004” for the step number 12a (the fifth line in FIG. 7).

  Next, when the numerical value “660” is input by operating the numerical keys for the calculation without tax, the CPU 21 stores the input numerical value in the display memory area 22p and causes the display unit 12 to display the input numerical value. The CPU 21 displays “005” for the number of steps 12a (the sixth line in FIG. 10). As shown in FIG. 11, the CPU 21 registers operation data (code [GST + / TAX-]) corresponding to the tax calculation mode switching key 11d one-to-one in the calculation data storage area 22s in association with step “004”, as shown in FIG. .

  Next, when the tax 3 calculation key 11b3 is operated, the CPU 21 calculates the tax-excluded amount “600” based on the input numerical value “660” and the tax rate 3 (here, 10%) corresponding to the tax 3 calculation key 11b3. After the calculation, the numerical value “600” and “TAX-3” as the tax calculation key symbol 12c corresponding to the tax 3 calculation key 11b3 are displayed on the display unit 12. The CPU 21 displays “006” in the step number 12a (the seventh line in FIG. 10). Further, the CPU 21 stores the result of the tax calculation using the tax rate 3 with the tax 3 calculation key 11b3 in the tax rate 3 total memory area 22e.

  Here, when it is detected that the tax 3 calculation key 11b3 has been operated in a state where the tax-excluded amount “600” is displayed on the display unit 12, the CPU 21 proceeds to step “005” as shown in FIG. “600”, the operation data (code [GST + 3 / TAX-3]) corresponding one-to-one to the tax 3 calculation key 11b3 is registered in the calculation data storage area 22s. Further, the CPU 21 causes the display unit 12 to display the tax amount “60” instead of the tax-excluded amount “600” in response to the operation of the tax 3 calculation key 11b3. The CPU 21 displays “007” for the number of steps 12a (the eighth line in FIG. 10).

  Next, it is assumed that the confirmation mode has been instructed by operating the [CHECK FWARD] key 11f. The CPU 21 determines that the tax calculation has been completed, and registers it in the calculation data storage area 22s in association with the step “007” and the numerical value “60” as shown in FIG.

  In addition, the CPU 21 displays the confirmation mode symbol 12g “REV” indicating that the mode has shifted to the confirmation mode in response to the operation of the [CHECK FORWARD] key 11f, and displays the first (step) stored in the calculation data storage area 22s. The calculation data “001” is read out, and the contents of the tax calculation executed earlier are displayed on the display unit 12 (the ninth line in FIG. 10).

  That is, the CPU 21 displays the numerical value and the function symbol indicated by the calculation data in accordance with the numerical data and the calculation data (the code indicating the operated key) registered in association with step “001”.

  FIG. 12 is a diagram illustrating a display example of the display unit 12 on which the calculation content of step “001” is displayed based on the calculation data stored in the calculation data storage area 22s illustrated in FIG. As shown in FIG. 11, the calculation data storage area 22s stores numerical data "300" in association with step "001" and calculation data [GST + 3 / TAX-3] indicating that the tax 3 calculation key 11b3 has been operated. ] Is registered. Therefore, as shown in FIG. 12, the CPU 21 displays the numerical value “300” and, as the tax calculation key symbol 12c indicating the key operated during the tax calculation, displays the function symbol (eg, [GST + 3 / TAX− 3]) is displayed. Note that the CPU 21 displays “001” as the number of steps 12a and also displays the confirmation mode symbol 12g “REV”.

  Hereinafter, when the [CHECK FWARD] key 11f is continuously operated, the CPU 21 sets the numerical values respectively associated with the steps “002” to “007” of the calculation data registered in the calculation data storage area 22s shown in FIG. Based on the data and the operation data (function), a numerical value indicating the calculation content and a function symbol are switched and displayed. That is, the CPU 21 determines that the numerical value “300” for step “002”, the function symbol [GST + 3 / TAX−3] (10th line in FIG. 10), and the numerical value “300” for step “003” (FIG. 10). Line 11), function symbol [GST + / TAX-] (line 12 in FIG. 10) for step "004", numerical value "660" for step "005", function symbol [GST + 3 / TAX-3] (13th line in FIG. 10), a numerical value “600” for step “006”, a function symbol [GST + 3 / TAX-3] (14th line in FIG. 10), and a numerical value “60” for step “007” (Line 15 in FIG. 10) is displayed.

  As described above, when the key information (extended information) is not registered in the calculation data, only the calculation data (function) corresponding to the operated key on a one-to-one basis is registered in the calculation data in the calculation data storage area 22s. . Therefore, when displaying the calculation contents in the confirmation mode, a function symbol corresponding to only the operation data (function) is displayed. Therefore, when the functions of the tax-inclusive calculation and the tax-excluding calculation are assigned to one key like the tax calculation key 11b, simply displaying the function symbol corresponding to the tax calculation key 11b on a one-to-one basis requires the tax calculation key 11b. At the time of calculation, it is impossible to determine which function of the tax-inclusive calculation or the tax-exclusive calculation has been executed.

  Next, a case where key information (extended information) is registered in calculation data in the present embodiment will be described.

  FIG. 13 shows specific key operations used in the following description, the number of steps and numerical values displayed on the display unit 12, function symbols displayed according to the key operations, and mode symbols indicating the operation state of the calculator 10. ing. The key operation shown in FIG. 13 is the same as that in FIG. 7 described above. FIG. 14 is a diagram showing an example of calculation data registered in the calculation data storage area 22s by the key operation for tax calculation shown in FIG. The calculation data ([GST + / TAX-]) is registered in the calculation data storage area 22s shown in FIG. 11 according to the key operation of the tax calculation key 11b, but in FIG. 14, the tax calculation key 11b is registered. An example is shown in which the calculation data is not registered in response to the key operation. FIGS. 15A to 15N are diagrams showing display examples on the display unit 12 in response to the key operations shown in FIG.

  The key operation for tax calculation is performed in the same manner as the key operation shown in FIG. 10 described above, and a detailed description thereof will be omitted. When the tax 3 calculation key 11b3 is operated for calculating the tax included in the input numerical value “300”, the CPU 21 sets the step “001”, the numerical value “300”, and the tax 3 calculating key 11b3 in the same manner as described above. One corresponding operation data (code [GST + 3 / TAX-3]) is associated and registered in the calculation data storage area 22s. The CPU 21 executes a tax-inclusive calculation corresponding to the tax 3 calculation key 11b3 for the numerical value “300” and displays the calculation result ((FIGS. 15A, 15B, and 15C)).

  Further, the CPU 21 registers the key information ([GST +]) corresponding to the tax 3 calculation key 11b3 in association with the previously registered numerical data “300” and the calculation data (code [GST + 3 / TAX-3]). (The verification memory registration process shown in the flowchart of FIG. 6).

  Similarly, when the tax 3 calculation key 11b3 is operated, the CPU 21 displays the tax-excluded amount on the display unit 12 in accordance with the operation of the tax 3 calculation key 11b3 (FIG. 15D), and calculates the calculation data. Key information ([GST +]) is added to the storage area 22s as a set of numerical data and operation data (step “002” shown in FIG. 14).

  Here, when the tax calculation mode switching key 11d is operated to change the tax calculation to the tax-excluded calculation, the CPU 21 sets the tax calculation mode symbol 12b to the tax-excluded calculation as shown in FIG. TAX-].

  Here, when the numerical value “660” is input and the tax 3 calculation key 11b3 is operated for the calculation without tax, the CPU 21 proceeds to step “004”, the numerical value “660”, and the tax The calculation data (code [GST + 3 / TAX-3]) corresponding one-to-one to the third calculation key 11b3 is registered in the calculation data storage area 22s. The CPU 21 executes the tax exclusion calculation corresponding to the tax 3 calculation key 11b3 for the numerical value "660", and displays the numerical value "600" indicating the tax exclusion amount as the calculation result (FIG. 15 (G)).

Further, the CPU 21 associates the key information ([TAX-]) corresponding to the tax 3 calculation key 11b3 with the previously registered numerical data "660" and the operation data (code [GST + 3 / TAX-3]) in one-to-one correspondence. And register (step "004" in FIG. 14).
Similarly, when the display of the tax amount is instructed by the tax 3 calculation key 11b3, the CPU 21 causes the display unit 12 to display the tax amount “60” in accordance with the operation of the tax 3 calculation key 11b3 (FIG. 15 (H )), Key information ([TAX-]) is added to the set of numerical data and operation data in the calculation data storage area 22s (step "005" shown in FIG. 14).

  Next, it is assumed that the confirmation mode has been instructed by operating the [CHECK FWARD] key 11f.

  By repeatedly operating the [CHECK FORWARD] key 11f, the CPU 21 performs the tax calculation according to the calculation data stored in the calculation data storage area 22s as shown in FIGS. The content is displayed on the display unit 12. Note that the basic operation is the same as the above-described case where the key information is not registered, and a detailed description thereof will be omitted.

  When the method of registering key information as calculation data in the present embodiment is used, as shown in FIGS. 15I and 15J, a symbol indicating the tax 3 calculation key 11b3 operated for tax calculation is not used. A function symbol [GST + 3] indicating that the tax-inclusive calculation has been executed by operating the tax 3 calculation key 11b3 is displayed.

  Similarly, as for the calculation contents of the tax exclusion calculation, as shown in FIGS. 15 (L) and (M), the function symbol [TAX-3] indicating that the tax exclusion calculation has been executed by operating the tax 3 calculation key 11b3. ] Is displayed.

  In this manner, in the calculator 10 according to the present embodiment, when the tax calculation is performed by operating the tax calculation key 11b to which a plurality of functions are assigned, it is determined whether the function including the tax-inclusive calculation or the tax-excluding calculation is performed. Accordingly, key information corresponding to any function is added to the calculation data registered in the calculation data storage area 22s in association with the corresponding step. Accordingly, when the mode is changed to the confirmation mode in response to the operation of the confirmation key and the calculation content corresponding to the calculation data is displayed, instead of the symbol corresponding to the tax calculation key 11b, the tax-inclusive calculation or the tax exemption in accordance with the key information. A function symbol indicating any of the calculations can be displayed. Therefore, it is possible to easily determine which function has been executed by the tax calculation key 11b when checking the content of the calculation executed earlier.

  In the above description, a case is described in which a plurality of functions are assigned to physical (mechanical) keys provided in the key input unit 11 of the calculator 10, but a software keyboard is used. The same can be applied to the case.

  In addition, the methods described in the embodiment, that is, each method such as the processing shown in the flowcharts of FIGS. 3 to 6, can be executed by a computer as a program such as a memory card (ROM card, RAM card, etc.), a magnetic disk ( It can be stored and distributed on a recording medium such as a flexible disk, a hard disk, an optical disk (CD-ROM, DVD, etc.), a semiconductor memory, or the like. Then, the computer reads the program recorded on the external recording medium, and the operation is controlled by the program, whereby the same processing as the function described in the embodiment can be realized.

  Also, program data for implementing each method can be transmitted over a network (Internet) in the form of a program code. Program data is transmitted from a computer (server device or the like) connected to the network (Internet). It is also possible to realize the same function as the above-described embodiment by taking in.

  The present invention is not limited to the embodiment, and can be variously modified in an implementation stage without departing from the scope of the invention. Further, the embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed components. For example, even if some components are deleted from all the components shown in the embodiments or some components are combined, the problem described in the section of the problem to be solved by the invention can be solved. In the case where the effect described in the section of the effect can be obtained, a configuration in which this component is deleted or combined can be extracted as an invention.

  Hereinafter, the invention described in the claims of the present application is additionally described.

[1] A plurality of calculation data including numerical data indicating the numerical key input by an operation on the numerical key and operation data indicating the function key input by an operation on the function key to which the function is assigned are sequentially input. Calculation data registration means to be registered;
Determining means for determining which of the first function and the second function is designated by an operation on the function key when a first function and a second function are assigned to the function key;
When it is determined that the first function is specified, first extended information indicating the first function is added to the calculation data, and when it is determined that the second function is specified, Information adding means for adding second extended information indicating the second function to the calculation data;
In response to an instruction to confirm the calculation data, a numerical value corresponding to the numerical data is displayed on a display unit, and a first symbol is displayed on the display unit when the calculation data is added to the first extended information. And a first display unit for displaying the second symbol on the display unit when the second extended information is added to the calculation data.

[2] when it is determined that the first function has been designated by operating the function key, the first symbol is displayed on the display unit;
The computer according to [1], further comprising second display means for displaying the second symbol on the display unit when it is determined that the second function has been designated by operating the function key.

  [3] The function key includes a first function of performing a tax-inclusive tax calculation according to a preset tax rate on the numerical value indicated by the numerical data, and a second function of performing a tax-excluded calculation in accordance with the tax rate. The computer according to [1], wherein

  [4] The computer according to [3], wherein the first display means displays the first symbol representing the tax rate and the calculation including tax, and the second symbol representing the tax rate and the calculation without tax.

[5] A calculation confirmation method executed by a computer provided with a key for receiving an input operation,
Numerical data indicating the numerical key input by the operation of the numerical key, and a plurality of calculation data including the calculation data indicating the function key input by the operation of the function key to which the function is assigned to register a plurality of calculation data in the input order,
When a first function and a second function are assigned to the function key, it is determined which of the first function and the second function is designated by an operation on the function key,
When it is determined that the first function is specified, first extended information indicating the first function is added to the calculation data, and when it is determined that the second function is specified, Adding second extended information indicating the second function to the calculation data;
In response to an instruction to confirm the calculation data, a numerical value corresponding to the numerical data is displayed on a display unit, and a first symbol is displayed on the display unit when the calculation data is added to the first extended information. A calculation confirmation method for displaying the second symbol on the display unit when the second extended information is added to the calculation data.

[6] Computer,
Calculation for registering a plurality of calculation data including numerical data indicating the numeric key input by an operation on a numeric key and operation data indicating the function key input by an operation on a function key to which a function is assigned, in the order of input Data registration means;
Determining means for determining which of the first function and the second function is designated by an operation on the function key when a first function and a second function are assigned to the function key;
When it is determined that the first function is specified, first extended information indicating the first function is added to the calculation data, and when it is determined that the second function is specified, Information adding means for adding second extended information indicating the second function to the calculation data;
In response to an instruction to confirm the calculation data, a numerical value corresponding to the numerical data is displayed on a display unit, and a first symbol is displayed on the display unit when the calculation data is added to the first extended information. A program for displaying as a first display means for displaying a second symbol on the display unit when the second extended information is added to the calculation data.

[7] When storing the first information specifying the numerical value and the second information specifying the key operated when inputting the function to be executed using the numerical value into the storage unit,
When a plurality of functions are assigned to the key, third information that can specify any one of the plurality of functions to be executed using the numerical value is further added to the storage unit. A computer having a control unit for storing.

[8] The control unit:
When reading the first information and the second information stored in the storage unit,
When the key specified by the second information is a key to which the plurality of functions are assigned, the third information that can specify any one of the functions is the first information and the second information. The computer according to [7], wherein the computer is read from the storage unit in addition to the above.

[9] An information registration method executed by a computer,
When storing the first information specifying the numerical value and the second information specifying the key operated when inputting the function to be executed using the numerical value in the storage unit,
When a plurality of functions are assigned to the key, third information that can specify any one of the plurality of functions to be executed using the numerical value is further added to the storage unit. How to register information.

[10] By computer
When storing the first information specifying the numerical value and the second information specifying the key operated when inputting the function to be executed using the numerical value in the storage unit,
When a plurality of functions are assigned to the key, third information that can specify any one of the plurality of functions to be executed using the numerical value is further added to the storage unit. A program for storing.

  10 Calculator, 11 Key input section, 11b0 Tax 0 calculation key, 11b1 Tax 1 calculation key, 11b2 Tax 2 calculation key, 11b3 Tax 3 calculation key, 11b4 Tax 4 calculation key, 11c Tax calculation total Key, 11d: Tax calculation mode switching key, 12: Display unit, 21: CPU, 22: Memory, 22a: Calculation processing program, 22b: Tax rate 0 total memory area, 22c: Tax rate 1 total memory area, 22d: Tax rate 2 total Memory area, 22e: Total tax rate 3 memory area, 22f: Total tax rate 4 memory area, 22g: Total tax memory area, 22h: Total memory area, 22k: Total tax recall mode area, 22m: Tax calculation mode area, 22n: Buffer Memory area, 22p: display memory area, 22r: calculation mode area, 22s: calculation data storage area.

Claims (10)

Calculation for registering a plurality of calculation data including numerical data indicating the numeric key input by an operation on a numeric key and operation data indicating the function key input by an operation on a function key to which a function is assigned, in the order of input Data registration means;
Determining means for determining which of the first function and the second function is designated by an operation on the function key when a first function and a second function are assigned to the function key;
When it is determined that the first function is specified, first extended information indicating the first function is added to the calculation data, and when it is determined that the second function is specified, Information adding means for adding second extended information indicating the second function to the calculation data;
In response to an instruction to confirm the calculation data, a numerical value corresponding to the numerical data is displayed on a display unit, and a first symbol is displayed on the display unit when the calculation data is added to the first extended information. And a first display unit for displaying the second symbol on the display unit when the second extended information is added to the calculation data. When determining that the first function has been designated by operating the function key, displaying the first symbol on the display unit;
2. The computer according to claim 1, further comprising: a second display unit configured to display the second symbol on the display unit when it is determined that the second function is designated by operating the function key. 3.   The function key is assigned the first function of performing a tax-inclusive tax calculation according to a preset tax rate for the numerical value indicated by the numerical data, and the second function of performing a tax-excluded calculation according to the tax rate. The computer according to claim 1.   The computer according to claim 3, wherein the first display means displays the first symbol representing the tax rate and the calculation including tax, and the second symbol representing the tax rate and the calculation without tax. A calculation confirmation method executed by a computer provided with a key for receiving an input operation,
Numerical data indicating the numerical key input by the operation of the numerical key, and a plurality of calculation data including the calculation data indicating the function key input by the operation of the function key to which the function is assigned to register a plurality of calculation data in the input order,
When a first function and a second function are assigned to the function key, it is determined which of the first function and the second function is designated by an operation on the function key,
When it is determined that the first function is specified, first extended information indicating the first function is added to the calculation data, and when it is determined that the second function is specified, Adding second extended information indicating the second function to the calculation data;
In response to an instruction to confirm the calculation data, a numerical value corresponding to the numerical data is displayed on a display unit, and a first symbol is displayed on the display unit when the calculation data is added to the first extended information. A calculation confirmation method for displaying the second symbol on the display unit when the second extended information is added to the calculation data. Computer
Calculation for registering a plurality of calculation data including numerical data indicating the numeric key input by an operation on a numeric key and operation data indicating the function key input by an operation on a function key to which a function is assigned, in the order of input Data registration means;
Determining means for determining which of the first function and the second function is designated by an operation on the function key when a first function and a second function are assigned to the function key;
When it is determined that the first function is specified, first extended information indicating the first function is added to the calculation data, and when it is determined that the second function is specified, Information adding means for adding second extended information indicating the second function to the calculation data;
In response to an instruction to confirm the calculation data, a numerical value corresponding to the numerical data is displayed on a display unit, and a first symbol is displayed on the display unit when the calculation data is added to the first extended information. A program for displaying as a first display means for displaying a second symbol on the display unit when the second extended information is added to the calculation data. When storing the first information specifying the numerical value and the second information specifying the key operated when inputting the function to be executed using the numerical value in the storage unit,
When a plurality of functions are assigned to the key, third information that can specify any one of the plurality of functions to be executed using the numerical value is further added to the storage unit. A computer having a control unit for storing. The control unit includes:
When reading the first information and the second information stored in the storage unit,
When the key specified by the second information is a key to which the plurality of functions are assigned, the third information that can specify any one of the functions is the first information and the second information. The computer according to claim 7, wherein the computer reads the data from the storage unit together with the data. An information registration method executed by a computer,
When storing the first information specifying the numerical value and the second information specifying the key operated when inputting the function to be executed using the numerical value in the storage unit,
When a plurality of functions are assigned to the key, third information that can specify any one of the plurality of functions to be executed using the numerical value is further added to the storage unit. How to register information. By computer
When storing the first information specifying the numerical value and the second information specifying the key operated when inputting the function to be executed using the numerical value in the storage unit,
When a plurality of functions are assigned to the key, third information that can specify any one of the plurality of functions to be executed using the numerical value is further added to the storage unit. A program for storing.