JP6950344B2 - Arithmetic logic units, calculation methods, and programs - Google Patents

Description

The present invention relates to arithmetic units, calculation methods, and programs.

Generally, in a small electronic calculator, the number of digits of data that can be displayed is limited to the number of display digits of the display unit. Therefore, it is not possible to input data exceeding the number of display digits, and it is not possible to display all the data of the calculation result exceeding the number of display digits.

Therefore, if the integer digits of the calculation result overflow more than the number of displayed digits, an error is displayed, the data of the calculation result is displayed by rounding down the overflowed lower digits, and the number of overflowed digits is indicated by the decimal point. By showing, the calculation result can be known as an approximate number (rounded number error).

Then, in the state of the approximate number error, the key is locked and subsequent key input is prohibited. However, by releasing the state of the approximate number error (error display / key lock) by operating the [C] key, the approximate number is obtained. Can be used for the next calculation (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 55-08832

When the small electronic calculator is used, for example, to calculate the sales amount, when calculating the total amount of a plurality of different total amounts, the calculation result of the total amount overflows beyond the number of displayed digits, resulting in an approximate number error. May be in the state of.

In particular, when the small electronic calculator is used for a calculation that requires accuracy, the value of the lower digit that overflows beyond the number of displayed digits is hidden in the calculation result displayed as an approximate number error. Therefore, the user cannot confirm the exact value of the calculation result and cannot proceed with the next calculation.

The present invention has been made in view of such a problem, and is a computing device that makes it possible to easily confirm the value of a digit that is hidden due to overflow when an approximate number error occurs at the time of total calculation. The purpose is to provide a calculation method and a program.

The computing device according to the present invention is a first calculation for updating the first total data by adding one or a plurality of first result data for the input first calculation data to the first total data in the memory. To update the second total data by adding the first calculation receiving means that accepts the operation and one or more second result data for the input second calculation data to the second total data in the memory. The second calculation receiving means that accepts the second calculation operation, the updated first total data that is the result of adding the first result data to the first total data in the memory, and the second in the memory. the result of the second result data is added to the total data, and the display digit determining means for grand total data obtained by summing a second total data updated to determine whether exceeds a displayable digit of the display unit , The approximate number display control means for displaying the approximate number data of the total total data on the display unit when the display digit determination means determines that the total data exceeds the displayable digits of the display unit, and the approximate number display. When the approximate number data of the total data is displayed on the display unit by the control means, the updated first total data or the updated second total data stored in the memory is stored in the memory according to the user operation. It is provided with individual total display control means for displaying total data on the display unit.

According to the present invention, it is possible to confirm the digit value that is hidden due to overflow when an approximate number error occurs at the time of total calculation of tax-included amount data.

The front view which shows the appearance structure of the calculator 10 which concerns on embodiment of the arithmetic unit of this invention. The block diagram which shows the functional structure of the electronic circuit of the calculator 10 in this embodiment. The flowchart for demonstrating the operation (the 1) of the calculation function of the calculator 10 in this embodiment. The flowchart for demonstrating the operation (the 2) of the calculation function of the calculator 10 in this embodiment. The flowchart for demonstrating the operation (the 3) of the calculation function of the calculator 10 in this embodiment. The flowchart for demonstrating the operation (the 4th) of the calculation function of the calculator 10 in this embodiment. The figure which shows the specific example (the 1) of the input operation and display for demonstrating the tax calculation function of the calculator 10 in this embodiment. The figure which shows the specific example (the 2) of the input operation and display for demonstrating the tax calculation function of the calculator 10 in this embodiment. The figure which shows the specific example of the input operation and display for demonstrating the approximate number error function of the calculator 10 in this 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 a calculator 10 according to an embodiment of the computing device of the present invention.

In addition to the calculator 10, the calculation device includes a personal computer having a calculation function (a calculation processing program is implemented), a tablet computer, a smartphone, a mobile phone, a touch panel PDA (personal digital assistants), an electronic book, and a portable game. It can be configured as a machine or the like. A calculator such as the calculator 10 that is not equipped with physical keys (buttons) displays a software keyboard having an input function similar to that of the keys of the calculator 10, and calculates according to a key operation on the software keyboard. Execute the process.

The calculator 10 shown in FIG. 1 is a just-type calculator 10, and is provided with a round selector 11y and a decimal point selector 11z for setting rounding (rounding method of numerical values).

The calculator 10 in the present embodiment has a tax calculation function for calculating tax based on a plurality of tax rates (hereinafter, two tax rates of tax rate 1 (for example, "10%") and tax rate 2 (for example, "8%")). It has an approximate number error function that displays an approximate number error when the calculation result data calculated by the tax calculation function exceeds the number of display digits. In this embodiment, various data mean numerical values, and for example, numerical values used in calculations are applicable.

A key input unit 11 and a display unit 12 including a plurality of keys are provided on the front surface of the calculator 10. The key input unit 11 is provided with a numerical key, a calculation key, a tax calculation function key, and a function key. The numerical key includes, for example, a plurality of keys corresponding to each of [00] [0] to [9]. The calculation keys are, for example, a plurality of keys corresponding to each of the [+] (addition) key, the [-] (subtraction) key, the [x] (multiplication) key, the [÷] (division) key, and the [=] key. include. The tax calculation function keys include tax-included 1 calculation key (1st tax calculation key) 11b, tax-included 2 calculation key (2nd tax calculation key) 11c, tax-excluded 1 calculation key 11d, tax-excluded 2 calculation key 11e, and tax calculation total. The key 11f is provided. The function keys are, for example, an all clear key ([AC] key 11a), a clear key ([C] (error release) key 11x), a plurality of memory keys ([MRC] [M-] [M +]), and a grand total key. ([GT] key), [%] key 11g and the like are included.

The round selector 11y sets the calculation method for rounding. For example, the "F" setting specifies the display of the maximum displayable digit including the decimal point on the display unit 12. The "CUT" setting specifies truncation of the digits specified by the decimal point selector 11z. The "5/4" setting specifies rounding of digits 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" setting specifies a 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 the numerical value input by the operation of the key of the key input unit 11. On the display unit 12, numerical values for a limited number of lines (for example, one line) are displayed in a maximum of 12 digits. Further, in the state display area provided along the side of the display unit 12, characters and symbols (symbols) indicating the calculation mode being set and various setting states are displayed.

FIG. 2 is a block diagram showing a functional configuration of the electronic circuit of the calculator 10 in the present embodiment. The electronic circuit of the calculator 10 includes a plurality of units constituting the computer, including the 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 the input operation is performed, the CPU 21 detects the key for which the input operation has been performed by the key input signal from the key input unit 11, and executes various arithmetic processes corresponding to the detected keys. In the calculator 10, the CPU 21 controls the operation of each part of the circuit according to the instruction described in the calculation processing program 22a, and the software and the hardware operate in cooperation with each other to perform the processing by the calculation function described in the following operation description. Realize the 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 24, or may communicate via the communication unit 25. It may be downloaded from the server 30 on the network N (including the Internet and the like).

In addition to storing the calculation processing program 22a, the memory 22 has an area for storing each data such as tax rate 1 total memory area 22b, tax rate 2 total memory area 22c, tax total memory area 22d, and post-tax mode data 22e. Provided. Here, the memory 22 is configured to have a plurality of areas inside and the area to be used is determined according to the type of the program or data to be stored, but the present invention is not limited to this. The memory 22 may have a plurality of memories, and the memory to be used may be determined from the plurality of memories according to the type of the program or data to be stored. Further, the memory 22 may be provided in the storage means.

The tax rate 1 total memory area 22b is an area for storing data calculated by tax calculation based on the tax rate 1. The CPU 21 uses the tax rate 1 for the tax-included amount data (first tax-excluded amount data) for the numerical value indicating the tax-excluded amount data (first tax-excluded amount data) input by the input operation of the key input unit 11 according to the instruction described in the calculation processing program 22a. The first tax-included amount data) and the tax amount data (first tax amount data) are calculated. In the tax rate 1 total memory area 22b, the first tax-excluded amount data input by the input operation of the key input unit 11 and the first tax-excluded amount data are calculated. The first tax-included amount data and the first tax-amount data obtained for the tax-excluded amount data are stored as a set. When there are a plurality of first tax-excluded data input by the input operation of the key input unit 11, the first tax-excluded data and the first tax-excluded data obtained for the first tax-excluded data are stored in the tax rate 1 total memory area 22b. 1 tax-included amount data and 1st tax amount data are combined and stored for each 1st tax-excluded amount data. That is, in the tax rate 1 total memory area 22b, the first tax-excluded amount data, the first tax-excluded amount data, and the first tax-excluded amount data are equal to the number of the first tax-excluded amount data input by the input operation of the key input unit 11. Is memorized as a set. Further, in the tax rate 1 total memory area 22b, the first tax-included total amount data indicating the total of the first tax-included amount data corresponding to at least one numerical value, and the first tax-excluded total amount data corresponding to the first tax-included total amount data. , The first tax total amount data corresponding to the first tax total amount data is stored.

The tax rate 2 total memory area 22c is an area for storing data calculated by tax calculation based on the tax rate 2. The CPU 21 uses the tax rate 2 for the tax-included amount data (tax-included amount data) with respect to the numerical value indicating the tax-excluded amount data (second tax-excluded amount data) input by the input operation of the key input unit 11 according to the instruction described in the calculation processing program 22a. The second tax amount data) and the tax amount data (second tax amount data) are calculated. In the tax rate 2 total memory area 22c, the second tax exemption data input by the input operation of the key input unit 11 and the second tax amount data are calculated. The second tax-included amount data and the second tax-amount data obtained for the tax-excluded amount data are stored as a set. When there are a plurality of second tax-excluded data input by the input operation of the key input unit 11, the second tax-excluded data and the second tax-excluded data obtained for the second tax-excluded data are obtained in the tax rate 2 total memory area 22c. 2 The tax-included amount data and the second tax amount data are combined and stored for each second tax-excluded amount data. That is, the second tax-excluded amount data, the second tax-excluded amount data, and the second tax-excluded amount data are stored in the tax rate 2 total memory area 22c for the number of the second tax-excluded amount data input by the input operation of the key input unit 11. Is memorized as a set. Further, in the tax rate 2 total memory area 22c, the second tax-included total amount data indicating the total data of the second tax-included amount data corresponding to at least one numerical value, and the second tax-excluded total amount corresponding to the second tax-included total amount data The second tax total amount data corresponding to the data and the second tax total amount data is stored.

The total tax memory area 22d is an area for storing data indicating the total of the numerical values calculated by the tax calculation based on the tax rate 1 and the numerical values calculated by the tax calculation based on the tax rate 2. The tax total memory area 22d corresponds to the tax-included total amount data and the tax-included total amount data, which are the sum of the first tax-included total amount data and the second tax-included total amount data, according to the input operation of the tax calculation total key 11f. The total tax-excluded total amount data and the total tax-included total amount data corresponding to the total tax-included total amount data are stored.

The post-tax mode data 22e is data indicating whether or not the total tax-included total amount data is in the state after being calculated according to the input operation of the total tax calculation key 11f (mode on / off after total tax). ..

The post-tax mode is turned on when the total tax-included total amount data is calculated, and when a key other than the tax-included 1 calculation key 11b and the tax-included 2 calculation key 11c is operated, for example, the [AC] key 11a is operated or the numerical key is operated. By doing so, it is turned off when a new numerical value is input.

When the tax-included mode is on (the state after the tax-included total amount is calculated), when the operation for the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c is performed, the (1st / 2nd) tax-included total The amount data is displayed (total amount display control process including tax). And every time the same key (1 calculation key 11b including tax or 2 calculation key 11c including tax) is operated, the total amount data excluding tax corresponding to the (1st / 2nd) total amount data including tax, (1st / 2nd) The total tax amount data corresponding to the total amount data including tax is switched and displayed in sequence.

In addition, when the post-tax mode is off (that is, not after the total tax-included total amount is calculated), if the operation for the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c is performed, the displayed value is converted to the tax-excluded amount data. (1st / 2nd) tax-included amount data is displayed (tax-included amount display control process). Then, when the same key (1 calculation key 11b including tax or 2 calculation key 11c including tax) is operated, the (1st / 2nd) tax amount data is displayed.

Next, the operation of the calculator 10 in this embodiment will be described. 3, FIG. 4, FIG. 5 and FIG. 6 are flowcharts for explaining the operation of the calculation function of the calculator 10 in the present embodiment. 7 and 8 are diagrams showing specific examples of input operations and displays for explaining the tax calculation function of the calculator 10 in the present embodiment.

Here, after explaining a series of tax calculation functions, an operation example will be described when the data of the calculation result by the tax calculation function exceeds the number of display digits (computable digits: 12) and an approximate number error occurs. ..

(Tax calculation function)
First, the user operates (presses) the [AC] key 11a in order to clear the display before starting the calculation. When the [AC] key 11a is operated (steps A1, Yes), the CPU 21 determines each area of the memory 22 used for tax calculation, that is, the tax rate 1 total memory area 22b, the tax rate 2 total memory area 22c, and the tax total memory. Clear all areas 22d (step A2). Next, the CPU 21 turns off the post-tax mode stored in the post-tax mode data 22e (step A3). FIG. 8 (A1) shows a display example when the [AC] key 11a is operated. When the [AC] key 11a is operated while the numerical value such as the tax calculation result data is displayed, the CPU 21 clears the previously displayed numerical value and displays "0" on the display unit 12. Let me.

Return to FIG. Immediately after the input operation of the [AC] key 11a (after returning to step A1 from step A3), when the input operation for the tax-included 1 calculation key 11b is detected (steps A1, A4, A6, No. Steps A8, A9, Yes), the CPU 21 displays the tax rate 1 set for the tax-included 1 calculation key 11b on the display unit 12 (step A10). In the present embodiment, "10%" is set as the tax rate 1 in the initial setting. Similarly, when the input operation for the tax-included 2 calculation key 11c is detected immediately after the input operation of the [AC] key 11a (after returning from step A3 to step A1) (steps A1, A4, A6, A8, No. Steps A26, A27, Yes) in FIG. 5, the CPU 21 displays the tax rate 2 set for the tax-included 2 calculation key 11c on the display unit 12 (step A28). In the present embodiment, "8%" is set as the tax rate 2 in the initial setting.

Next, when the numerical key is operated by the user to input the numerical value to be calculated by returning from step A28 in FIG. 5 to step A1 in FIG. 3 (step A1, No. step A4, Yes), the CPU 21 Inputs a numerical value (numerical data) corresponding to the numerical key that has been input, and displays the input numerical value on the display unit 12 (step A5). Next, the CPU 21 keeps the post-tax mode stored in the post-tax mode data 22e off (step A3), returns to step A1, and when the calculation keys are operated (steps A1, A4, No). Step A6, Yes), the CPU 21 inputs an operation (calculation data) corresponding to the input operation operation key, and displays the input operation symbol (symbol) in the status display area of the display unit 12 (. Step A7). Here, when the CPU 21 can execute the calculation based on the input calculation data and the input numerical data, the CPU 21 executes this calculation and displays the result in the middle of the calculation on the display unit 12. Next, the CPU 21 keeps the post-tax mode stored in the post-tax mode data 22e off (step A3), and returns to step A1. Hereinafter, in the same manner, by repeating the input of the numerical data and the calculation data, the CPU 21 sequentially stores the input numerical data and the calculation data. Then, when the "=" (equal) key is operated by the user operation, the CPU 21 inputs the calculation data corresponding to the input operation operation key ("=" key), and the numerical data input up to that point. And the calculation according to the calculation data (“=” data) is executed, and the calculation result is displayed on the display unit 12 (steps A4 to A7).

In this way, when the input operation of the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c is detected in the state where the numerical value is displayed on the display unit 12, the CPU 21 displays the numerical value indicating the tax-excluded amount data displayed on the display unit 12. On the other hand, the tax calculation data is executed based on the tax rate corresponding to the tax calculation key for which the input operation is performed. In the above description, the numerical value displayed on the display unit 12 for tax calculation is the value obtained by the calculation, but the numerical value input by simply inputting the numerical key is calculated as tax. It may be the target of.

For example, when the CPU 21 detects the input operation of the tax-included 1 calculation key 11b (steps A8, Yes), the post-tax mode is in the off state (steps A9, No. Steps A11, Yes), and therefore is subject to tax calculation. The tax-included amount data and the tax amount data are calculated based on the tax rate 1 (for example, "10%") for the displayed numerical value, and stored in the tax rate 1 total memory area 22b together with the tax-excluded amount data indicated by the displayed numerical value. (Step A12). Next, the CPU 21 causes the display unit 12 to display the tax-included amount data calculated based on the tax rate 1 (step A13). Similarly, the input operation of the tax-included 1 calculation key 11b was detected while the numerical value (or the numerical value calculated by the calculation) input by the operation of the numerical key was displayed on the display unit 12 (steps A4 to A7). In the case (step A8, Yes), the CPU 21 calculates the tax on the numerical value displayed on the display unit 12 based on the tax rate 1, stores the calculation result in the total memory area 22b of the tax rate 1, and displays the tax-included amount. It is displayed on 12 (steps A8 to A13). That is, it is possible to continuously instruct tax calculation for a plurality of numerical values.

Further, when the CPU 21 detects the input operation of the tax-included 2 calculation key 11c (steps A1, A4, A6, A8, No. Steps A26, Yes in FIG. 5, step A27, No), the post-tax mode is in the off state. (Step A29, Yes), the tax-included amount data and tax-amount data are calculated based on the tax rate 2 (for example, "8%") for the displayed value to be calculated, and the displayed value. The tax rate 2 total memory area 22c is stored together with the tax-excluded data indicated by (step A30). Next, the CPU 21 causes the display unit 12 to display the tax-included amount data calculated based on the tax rate 2 (step A31). Similarly, the input operation of the tax-included 2 calculation key 11c was detected while the numerical value (or the numerical value calculated by the calculation) input by the operation of the numerical key was displayed on the display unit 12 (steps A4 to A7). In the case (step A26, Yes), the CPU 21 calculates the tax on the numerical value displayed on the display unit 12 based on the tax rate 2, stores the calculation result data in the tax rate 2 total memory area 22c, and displays the tax-included amount. It is displayed on the unit 12 (steps A26 to A31).

An example of inputting specific numerical values and tax calculation will be described below. FIG. 7 is a diagram showing an example of input numerical values (tax-excluded amount), tax-included amount, and tax amount used in the following description of the tax calculation function. 8 (B1) to 8 (B7) show that a plurality of numerical values (tax-excluded amount) shown in FIG. 7 are input and the tax rate for each is specified by the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c. ing.

For example, as shown in FIG. 8 (B1), when the tax-included 1 calculation key 11b is operated after the numerical value "1000" is input, the CPU 21 displays the tax-included amount "1100" calculated based on the tax rate 1. Displayed in unit 12. Further, the CPU 21 causes the display unit 12 to display the symbol “tax 1” indicating that the tax-included amount calculated based on the tax rate 1 is displayed. Similarly, when the numerical values "200", "5000", and "1500" are input and the tax-included 1 calculation key 11b is operated for each, the CPU 21 is as shown in FIGS. 8 (B2) to 8 (B4). The display unit 12 displays the tax-included amount data calculated based on the tax rate 1 for each numerical value. The result of the tax calculation for each numerical value is stored in the tax rate 1 total memory area 22b.

Further, for example, as shown in FIG. 8 (B5), when the tax-included 2 calculation key 11c is operated after the numerical value "2000" is input, the CPU 21 calculates the tax-included amount data "2160" based on the tax rate 2. Is displayed on the display unit 12. Further, the CPU 21 causes the display unit 12 to display the symbol “tax 2” indicating that the tax-included amount data calculated based on the tax rate 2 is displayed. Similarly, when the numerical values "3000" and "400" are input and the tax-included 2 calculation key 11c is operated for each, the CPU 21 performs each as shown in FIGS. 8 (B6) to 8 (B7). The tax-included amount data calculated based on the tax rate 2 for the numerical value is displayed on the display unit 12. The result of tax calculation for each numerical value is stored in the tax rate 2 total memory area 22c.

In this way, the calculator 10 in the present embodiment can arbitrarily specify the tax rate used for tax calculation on the input numerical value by operating the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c. Therefore, for example, when calculating the total tax-included total amount data of a plurality of products having different applicable tax rates, it is possible to individually specify the tax rate and input the tax-excluded amount data for a plurality of products having different applicable tax rates. The work can be facilitated. In FIGS. 8 (B1) to 8 (B7), the tax calculation is continuously executed for the numerical value to which the tax rate 1 is applied and the numerical value to which the tax rate 2 is applied, but the tax rate 1 and the tax rate 2 are mixed. You can specify (individually specify) to perform tax calculation.

If the key operated to instruct the tax calculation (1 calculation key 11b including tax or 2 calculation key 11c including tax) is continuously operated while the tax-included amount is displayed, the CPU 21 displays the tax-included amount display as the tax amount. Is switched to and displayed on the display unit 12. For example, when the tax-included amount data calculated based on the tax rate 1 is displayed (step A13 in FIG. 3) and the tax-included 1 calculation key 11b is operated (steps A14, Yes), the CPU 21 has a tax rate of 1. The tax amount data calculated based on the above is read from the total memory area 22b of the tax rate 1 and displayed on the display unit 12 (step A15). Further, when the tax-included 1 calculation key 11b is continuously operated (steps A16, Yes), the process returns to step A13, and the CPU 21 displays the tax-included amount data calculated based on the tax rate 1. Further, when the tax-included amount data calculated based on the tax rate 2 is displayed (step A31 in FIG. 5), when the tax-included 2 calculation key 11c is operated (step A32, Yes), the CPU 21 has a tax rate of 2. The tax amount calculated based on the above is read from the total memory area 22c of the tax rate 2 and displayed on the display unit 12 (step A33). Further, when the tax-included 2 calculation key 11c is continuously operated (steps A34, Yes), the process returns to step A31, and the CPU 21 displays the tax-included amount data calculated based on the tax rate 2 on the display unit 12. That is, after the calculator 10 calculates the tax-included amount data according to the operation of the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c, the tax-included amount data is calculated for each operation on the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c. The display and the display of the tax amount data can be alternately switched to be displayed on the display unit 12. Therefore, the tax-included amount and the tax-included amount can be easily confirmed.

Next, when the tax calculation total key 11f is operated in the state where the tax-included amount data or the tax-amount data is displayed (steps A44 and Yes in FIG. 6), the CPU 21 uses the tax stored in the post-tax mode data 22e. After totaling, the mode is turned on (step A55). Next, the CPU 21 stores the total data of the tax-included amount data (first tax-included total amount data) calculated based on the tax rate 1 stored in the tax rate 1 total memory area 22b and the tax rate 2 total memory area 22c. The total tax-included data calculated based on the tax rate 2 (the second total tax-included data) and the total tax-included data are calculated and stored in the total tax memory area 22d (step A45). ).

Here, the CPU 21 determines whether or not the calculated total amount data including tax exceeds the computable digits, which is the number of display digits (12 digits) (step A45a), and if it does not exceed (step A45a, step A45a, No), the tax-included total amount data is displayed on the display unit 12 (step A45b).

The calculator 10 displays the tax-included total amount data by continuously operating the tax calculation total key 11f while the tax-included total amount data is displayed on the display unit 12. It is possible to sequentially switch and display the total tax amount data (tax-excluded total amount display control process).

When the tax-included total amount data is displayed (step A45b), when the tax calculation total key 11f is operated (step A46, Yes), the CPU 21 sets the tax rate 1 total memory area 22b and the tax rate 2 total memory area 22c. Based on the stored data, the total tax-excluded total data corresponding to the total tax-included data is calculated and stored in the total tax memory area 22d (step A47). Next, the CPU 21 determines whether or not the calculated total amount data excluding tax exceeds the computable digits, which is the number of display digits (12 digits) (step A47a), and if it does not exceed (step A47a). , No), the tax-excluded total amount data is displayed on the display unit 12 (step A47b).

Further, when the tax-excluded total amount data is displayed (step A47b), when the tax calculation total key 11f is operated (step A48, Yes), the CPU 21 has a tax rate 1 total memory area 22b and a tax rate 2 total memory. Based on the data stored in the area 22c, the total tax total amount data corresponding to the total tax-included total amount data is calculated and stored in the total tax memory area 22d (step A49). Next, the CPU 21 determines whether or not the calculated total tax amount data exceeds the computable digits, which is the number of display digits (12 digits) (step A49a), and if it does not exceed (steps A49a, No.). ), The total tax amount data is displayed on the display unit 12 (step A49b).

Further, when the tax calculation total key 11f is operated (steps A50, Yes), the process returns to step A45, and the CPU 21 calculates the tax-included total amount data and displays it on the display unit 12 (steps A45 to A45b). ).

That is, the calculator 10 calculates the tax-included total amount data according to the operation of the tax calculation total key 11f, and then corresponds to the tax-included total amount data and the tax-included total amount data for each operation for the tax calculation total key 11f. The display of the total tax data and the total tax data corresponding to the total tax data can be switched alternately. Therefore, the total tax-included total amount data, the total tax-excluded total amount data, and the total tax total amount data can be easily confirmed.

8 (C1) to 8 (C3) show a display example when the tax calculation total key 11f is operated. When the tax calculation total key 11f is operated after the tax calculation is performed on the plurality of numerical values shown in FIGS. 8 (B1) to 8 (B7), the CPU 21 determines the tax rate 1 as shown in FIG. 8 (C1). The tax-included total amount data "14302" indicating the total amount data of the tax-included amount data to which the tax rate 2 and the tax rate 2 are applied is displayed on the display unit 12. Here, when the tax calculation total key 11f is operated, the CPU 21 causes the display unit 12 to display the total tax-excluded total amount data “13100” as shown in FIG. 8 (C2). Further, when the tax calculation total key 11f is operated, the CPU 21 displays the total tax amount data "1202" on the display unit 12 as shown in FIG. 8 (C3) (tax-excluded total amount display control). process). Further, when the tax calculation total key 11f is operated, the CPU 21 displays the tax-included total amount data "14302" on the display unit 12, and the display content on the display unit 12 returns to that shown in FIG. 8 (C1).

When the CPU 21 determines that the calculated total tax-included total amount data exceeds the computable digits which are the number of display digits (12 digits) (steps A45a and Yes in FIG. 6), the total tax-included total amount data Is displayed as an approximate number in which the lower digits exceeding the displayable digits are hidden, and the symbol (E) of the approximate number error is displayed (step A45c). Here, when the [C] (error release) key 11x is operated (step A45d, Yes), the display of the approximate number error (E) is canceled, and the display of the total amount data including tax as the approximate number data is retained. (Step A45e). Then, the tax calculation total key 11f is in a standby state for determining whether or not it is continuously operated (step A46).

Further, similarly, when the CPU 21 determines that the calculated total tax-excluded total amount data exceeds the computable digit which is the number of display digits (12 digits) (steps A47a, Yes), the total tax-excluded total amount is determined. The total amount is displayed as an approximate number in which the lower digits exceeding the displayable digits are hidden, and the symbol (E) of the approximate number error is displayed (step A47c). Here, when the [C] (error release) key 11x is operated (step A47d, Yes), the display of the approximate number error (E) is canceled, and the total amount data excluding tax as the approximate number data is displayed. It is held (step A47e). Then, the tax calculation total key 11f is in a standby state for determining whether or not the tax calculation total key 11f is continuously operated (step A48).

Further, similarly, when the CPU 21 determines that the calculated total tax amount data exceeds the computable digit which is the number of display digits (12 digits) (steps A49a, Yes), the total tax amount The data is displayed as an approximate number in which the lower digits exceeding the displayable digits are hidden, and the symbol (E) of the approximate number error is displayed (step A49c). Here, when the [C] (error release) key 11x is operated (step A49d, Yes), the display of the approximate number error (E) is canceled, and the display of the total tax amount data as the approximate number data is retained. (Step A49e). Further, the tax calculation total key 11f is in a standby state for determining whether or not it is continuously operated (step A50).

An operation example when the calculation result data (tax-included total amount data, tax-excluded total amount data, or tax total amount data) corresponding to the operation of the tax calculation total key 11f is displayed as approximate number data will be described later. do.

Next, a case where the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c is operated after the post-tax mode is turned on (after the total amount including tax is calculated) will be described.

As shown in FIGS. 8 (C1) to 8 (C3), one calculation key including tax is displayed in the state where the total tax-included total amount data, the total tax-excluded total amount data, or the total tax-included total amount data is displayed on the display unit 12. When 11b is operated (steps A8 and Yes in FIG. 3), the CPU 21 has the post-tax mode turned on (steps A9, A11, No), so that the first tax-included amount data corresponding to at least one numerical value is available. The first tax-included total amount data indicating the total of the above is read from the tax rate 1 total memory area 22b and displayed on the display unit 12 (step A17 in FIG. 4). Further, when the first tax-included total amount data is displayed on the display unit 12 (step A17) and the tax-included 1 calculation key 11b is operated (steps A18, Yes), the CPU 21 determines the tax rate 1 total memory area 22b. The first tax-excluded total amount data corresponding to the first tax-included total amount data is read out from and displayed on the display unit 12 (step A19). Further, when the tax-included 1 calculation key 11b is operated (steps A20, Yes) while the first tax-excluded data is displayed on the display unit 12, the CPU 21 starts the tax rate 1 total memory area 22b to the first tax-included total amount. The first tax total amount data corresponding to the data is read out and displayed on the display unit 12 (step A21). That is, after the total tax-included total amount data is calculated, the calculator 10 has the first tax-included total amount data and the first tax-excluded total amount calculated based on the tax rate 1 for each operation on the tax-included 1 calculation key 11b. It is possible to switch to the display of either the data or the first tax total amount data. Therefore, the first tax-included total amount data, the first tax-excluded total amount data, and the first tax total amount data can be easily confirmed.

8 (D1) to 8 (D3) show an example of display on the display unit 12 when the tax-included 1 calculation key 11b is operated. When the tax-included 1 calculation key 11b is operated in the state shown in FIGS. 8 (C1) to 8 (C3), the CPU 21 is based on the tax rate 1 as shown in FIG. 8 (D1). The calculated first tax-included total amount data "8470" is displayed on the display unit 12. Here, when the tax-included 1 calculation key 11b is operated, the CPU 21 causes the display unit 12 to display the first tax-excluded total amount data “7700” as shown in FIG. 8 (D2). Further, when the tax-included 1 calculation key 11b is operated, the CPU 21 causes the display unit 12 to display the first tax total amount data “770” as shown in FIG. 8 (D3). Further, when the tax-included 1 calculation key 11b is operated, the CPU 21 returns to the display shown in FIG. 8 (D1) and causes the display unit 12 to display the first tax-included total amount data “8470”.

When the tax-included 2 calculation key 11c is operated in the display state shown in FIGS. 8 (D1) to 8 (D3) (steps A23, A24, A25, Yes), the CPU 21 is described in FIG. 8 below. Switch to the display of the second tax-included total amount shown in FIGS. (E1) to 8 (E3) (step A35 in FIG. 5). Further, when the tax calculation total key 11f is operated in the display state shown in FIGS. 8 (D1) to 8 (D3) (steps A51 and Yes in FIG. 4), the CPU 21 is the total amount including tax described above. The display state is entered (step A45 in FIG. 6).

On the other hand, as shown in FIGS. 8 (C1) to 8 (C3), tax-included total amount data, tax-excluded total amount data, or tax-excluded total amount data is displayed on the display unit 12, and tax-included 2 When the calculation key 11c is operated (steps A26, Yes in FIG. 5), the CPU 21 is in the post-tax mode on (steps A29, No), so that the second tax-included amount data corresponding to at least one numerical value. The second tax-included total amount data indicating the total data of the above is read from the tax rate 2 total memory area 22c and displayed on the display unit 12 (step A35). Further, when the second tax-included total amount data is displayed on the display unit 12 (step A35) and the tax-included 2 calculation key 11c is operated (step A36, Yes), the CPU 21 determines the tax rate 2 total memory area 22c. The second tax-excluded total amount data corresponding to the second tax-included total amount data is read out from and displayed on the display unit 12 (step A37). Further, when the tax-included 2 calculation key 11c is operated in the state where the second tax-excluded amount data is displayed on the display unit 12 (steps A38, Yes), the CPU 21 is charged with the tax rate 2 total memory area 22c to the second tax-included total amount. The second tax total amount data corresponding to the data is read out and displayed on the display unit 12 (step A39). That is, after the total tax-included total amount data is calculated, the calculator 10 has the second tax-included total amount data and the second tax-excluded total amount calculated based on the tax rate 2 for each operation on the tax-included 2 calculation key 11c. It is possible to switch to the display of either the data or the second tax total amount data. Therefore, the second tax-included total amount data, the second tax-excluded total amount data, and the second tax total amount data can be easily confirmed.

8 (E1) to 8 (E3) show an example of display on the display unit 12 when the tax-included 2 calculation key 11c is operated. When the tax-included 2 calculation key 11c is operated in the state shown in FIGS. 8 (C1) to 8 (C3), the CPU 21 is based on the tax rate 2 as shown in FIG. 8 (E1). The calculated second tax-included total amount data "5832" is displayed on the display unit 12. Here, when the tax-included 2 calculation key 11c is operated, the CPU 21 causes the display unit 12 to display the second tax-excluded total amount data “5400” as shown in FIG. 8 (E2). Further, when the tax-included 2 calculation key 11c is operated, the CPU 21 causes the display unit 12 to display the second tax total amount “432” as shown in FIG. 8 (E3). Further, when the tax-included 2 calculation key 11c is operated, the CPU 21 returns to the display shown in FIG. 8 (E1) and causes the display unit 12 to display the second tax-included total amount data “5832”.

When the tax-included 1 calculation key 11b is operated in the display state shown in FIGS. 8 (E1) to 8 (E3) (steps A41, A42, A43, Yes), the CPU 21 is shown in FIGS. 8 (D1) to 8 (D1). Switch to the display of the first tax-included total amount data shown in FIG. 8 (D3) (steps A11 and No. in FIG. 3; step A17 in FIG. 4). Further, when the tax calculation total key 11f is operated in the display state shown in FIGS. 8 (E1) to 8 (E3) (steps A52 and Yes in FIG. 5), the CPU 21 is subjected to the above-mentioned total tax-included total amount data. (Step A45 in FIG. 6).

That is, the calculator 10 displays the totals corresponding to each of the tax rate 1 and the tax rate 2 by a simple operation by operating the tax-included 1 calculation key 11b and the tax-included 2 calculation key 11c while the post-tax mode is on (Fig. 8 (D1) to 8 (D3) and 8 (E1) to 8 (E3)) can be switched and displayed. Further, the calculator 10 can be displayed by switching to the total total display (FIGS. 8 (C1) to 8 (C3)) by operating the tax calculation total key 11f.

In this way, in the calculator 10 of the present embodiment, the tax calculation based on the plurality of tax rates is performed by a simple operation using the tax-included 1 calculation key 11b and the tax-included 2 calculation keys 11c corresponding to each of the plurality of tax rates, and the tax calculation is performed. The contents can be easily confirmed.

(Approximate number error function)
FIG. 9 is a diagram showing a specific example of an input operation and a display for explaining the approximate number error function of the calculator 10 in the present embodiment.

Here, for example, it is assumed that the tax is calculated for each product A to D to which two tax rates (tax rate 1 = 10%, tax rate 2 = 8%) are applied in the currency of a country whose monetary value is extremely low due to inflation. do.

First, in response to the operation of the [AC] key 11a, the CPU 21 clears the tax rate 1 total memory area 22b, the tax rate 2 total memory area 22c, and the tax total memory area 22d, and the post-tax mode is set to off. As shown in 9 (A), with "0" displayed on the display unit 12 (steps A1 to A3 in FIG. 3), as shown in FIG. 9 (B), the product A to which the tax rate 1 is applied. The numerical data "500 ... 00" (500 billion) of the price is input (step A4, Yes. Step A5), and the tax-included 1 calculation key 11b is operated (step A8, Yes).

Then, since the post-tax mode is set to off (steps A9, No. Steps A11, Yes), the CPU 21 calculates the tax rate 1 based on the tax rate 1 as shown in FIG. 9C. The tax-included amount data "550 ... 00" (550 billion) stored in the total memory area 22b is displayed on the display unit 12 (steps A12 and A13).

Similarly, as shown in FIG. 9D, the numerical data “300… 00” (300 billion) of the price of the product B to which the tax rate 1 is applied is input (step A4, Yes. Step A5), and tax-included 1 When the calculation key 11b is operated (steps A8, Yes), the CPU 21 displays the tax-included amount data "330 ... 00" (330 billion) calculated based on the tax rate 1 and stored in the total memory area 22b of the tax rate 1. It is displayed on the unit 12 (steps A11, Yes. Steps A12, A13).

Subsequently, as shown in FIG. 9 (E), numerical data “1500 ... 00” (150 billion) of the price of the product C to which the tax rate 2 is applied is input (step A4, Yes. Step A5), and tax-included 2 When the calculation key 11c is operated (steps A26 and Yes in FIG. 5), the CPU 21 calculates the tax rate 2 based on the tax rate 2 and stores the tax rate 2 total memory area 22c in the tax-included amount data “162… 00” (162 billion). ) Is displayed on the display unit 12 (steps A29, Yes. Steps A30, A31).

Similarly, as shown in FIG. 9 (F), numerical data “700… 00” (70 billion) of the price of the product D to which the tax rate 2 is applied is input (steps A4 and Yes in FIG. 3). When the tax-included 2 calculation key 11c is operated (steps A26 and Yes in FIG. 5), the CPU 21 calculates the tax rate 2 based on the tax rate 2 and stores the tax-included amount data "756 ... 00" in the total memory area 22c. (75.6 billion) is displayed on the display unit 12 (steps A29, Yes. Steps A30, A31).

Then, as shown in FIG. 9 (G), when the tax calculation total key 11f is operated (steps A44 and Yes in FIG. 6), the CPU 21 sets the post-tax mode stored in the post-tax mode data 22e. Turn it on (step A55), and the total data of the tax-included amount of products A and B at the tax rate 1 stored in the tax rate 1 total memory area 22b (first tax-included total amount data) "888 ... 00" (880 billion). Tax rate 2 total tax-included total amount including tax-included total data of products C and D at tax rate 2 stored in the memory area 22c (second tax-included total amount data) "2376 ... 00" (237.6 billion) The data "11176 ... 00" (1.1176 trillion) is calculated and stored in the total tax memory area 22d (step A45).
At this time, since the calculated total amount data including tax "11176 ... 00" (1,117.6 billion) exceeds the calculable digit which is the number of display digits (12 digits) of the display unit 12 (step A45a). , Yes), the CPU 21 displays the total amount including tax as approximate number data "1.1176 ... 0" in which the lower one digit exceeding the displayable digit is hidden, and the symbol (E) of the approximate number error is displayed. Display (step A45c).

The user hides the lower 1 digit of the tax-included total amount data by displaying the decimal point in the upper 1 digit of the approximate number "1.1176 ... 0" of the displayed tax-included total amount data. It can be known that it is an approximate number, but if it is not possible to confirm that the hidden lower one digit value is "0" and the tax-included total amount data displayed as the approximate number is an accurate value, This tax calculation cannot be made accurate and advanced.

Here, as shown in FIG. 9H, when the [C] (error release) key 11x is operated (steps A45d, Yes), the CPU 21 cancels the display of the approximate number error (E), and the above. The display "1.1176 ... 0" of the total amount data including tax as an approximate number is retained (step A45e).

Then, in order to see the breakdown of the tax-included total amount data "1.1176 ... 0" displayed as the approximate number data, first, as shown in FIG. 9 (I), when the tax-included 1 calculation key 11b is operated. (Steps A8, Yes in FIG. 3) Since the post-tax mode is set to ON (steps A11, No), the CPU 21 is the first indicating the total of the first tax-included amount data from the tax rate 1 total memory area 22b. The total amount data including tax "880 ... 00" (880 billion) is read out and displayed on the display unit 12 (step A17 in FIG. 4).

Subsequently, as shown in FIG. 9 (J), when the tax-included 2 calculation key 11c is operated (steps A23, Yes), the post-tax mode is set to ON (steps A29, No. in FIG. 5). ), The CPU 21 reads out the second tax-included total amount data “2376 ... 00” (237.6 billion) indicating the total of the second tax-included amount data from the tax rate 2 total memory area 22c and displays it on the display unit 12 (step A35).

As a result, the user can use the first tax-included total amount data "888 ... 00" (880 billion) and the second tax-included total amount, which is a breakdown of the tax-included total amount data "1.1176 ... 0" displayed as the approximate number data. It can be easily confirmed that the last digit of any of the data "2376 ... 00" (237.6 billion) is "0", and the total amount data including tax "1.1176 ... 0" displayed as the approximate number. It can be confirmed that the hidden lower one digit value is also "0" and is accurate.

Then, as shown in FIG. 9 (K), when the tax calculation total key 11f is operated again (steps A52, Yes), the CPU 21 uses the tax rate 1 stored in the tax rate 1 total memory area 22b in the same manner as described above. Total data of tax-included amount data of products A and B (first tax-included total amount data) "888 ... 00" (880 billion) and tax rate 2 of products C and D at tax rate 2 stored in the total memory area 22c. Calculate the total tax-included total data "11176 ... 00" (1,117.6 billion), which is the total of the total tax-included data (the second total tax-included data) "2376 ... 00" (237.6 billion), and tax. It is stored in the total memory area 22d (step A45 in FIG. 6), and the total tax-included total amount data is displayed as an approximate number "1.1176 ... 0" (approximate number error (E)) in which the lower one digit is hidden (approximate number error (E)). Step A45a, Yes. Step A45c).

Here again, as shown in FIG. 9 (L), the display of the approximate number error (E) is canceled by operating the [C] (error release) key 11x (step A45d, Yes) (step A45e). As shown in 9 (M), when the tax calculation total key 11f is operated again (steps A46, Yes), the CPU 21 outputs the data stored in the tax rate 1 total memory area 22b and the tax rate 2 total memory area 22c. Based on the tax-excluded total amount data "10200 ... 00" (1.2 trillion) corresponding to the tax-included total amount data "11176 ... 00" (1.117.6 trillion), the total tax memory area 22d (Step A47). Further, the CPU 21 determines that the calculated total amount data excluding tax "10200 ... 00" (1.2 trillion) exceeds the computable digit, which is the number of display digits (12 digits) of the display unit 12. (Step A47a, Yes), the total amount excluding tax is displayed as an approximate number "1.0200 ... 0" in which the lower one digit exceeding the displayable digit is hidden, and the approximate number error symbol (E) is displayed. Is displayed (step A47c).

At this time, the user can use the tax-excluded data of each of the products A to D (see FIGS. 9 (B), 9 (D), 9 (E), and 9 (F)) in the last digit. Since we know that the numerical value is "0", the hidden lower 1 digit numerical value of the total tax-excluded total amount data "1.0200 ... 0" displayed as the approximate number data is also "0". You can confirm that there is.

Here again, as shown in FIG. 9 (N), the display of the approximate number error (E) is canceled by operating the [C] (error release) key 11x (step A47d, Yes) (step A47e). As shown in 9 (O), when the tax calculation total key 11f is operated again (steps A48, Yes), the CPU 21 outputs the data stored in the tax rate 1 total memory area 22b and the tax rate 2 total memory area 22c. Based on the above, the total tax amount data "9760 ... 00" (976 billion) corresponding to the total tax-included total amount data "11176 ... 00" (1.117.6 trillion) is calculated and stored in the total tax memory area 22d. (Step A49), and the total tax amount data is displayed on the display unit 12 (step A49a, No. step A49b).

Therefore, according to the tax calculation function and the approximate number error function of the calculator 10 having the above configuration, when a numerical value which is tax-excluded data of a product having a tax rate of 1 is input and the tax-included 1 calculation key (first tax calculation key) 11b is operated. , The tax-included amount data at the tax rate 1 is calculated, and is added and stored as the first tax-included total amount data of the tax rate 1 total memory area 22b. Similarly, when a numerical value that is tax-excluded data for a product with tax rate 2 is input and the tax-included 2 calculation key (second tax calculation key) 11c is operated, the tax-included amount data at the tax rate 2 is calculated, and the tax rate 2 total is calculated. It is added and stored in the memory area 22c as the second tax-included total amount data.

Then, when the tax calculation total key 11f is operated, the post-tax mode is turned on, and the tax-included total amount data, which is the total of the first tax-included total amount data and the second tax-included total amount data, is calculated and displayed. It is displayed in Part 12, and if the total amount data including tax exceeds the number of displayed digits (calculable digits), the lower digits of the excess digits are hidden and a decimal point is added to the upper digits. It is displayed on the display unit 12 as an approximate number (approximate number error E).

After that, when the approximate number error E is canceled by operating the [C] (error release) key 11x and the tax-included 1 calculation key 11b is operated, the tax-included post-tax mode is turned on, so that the first tax-included total is turned on. When the amount data is read out and displayed on the display unit 12, and when the tax-included 2 calculation key 11c is operated, the second tax-included total amount data is similarly read out and displayed on the display unit 12.

As a result, the user can set the last digit of both the first tax-included total amount data and the second tax-included total amount data, which are the breakdown of the tax-included total amount data displayed on the display unit 12 as the approximate number, to "0". It can be easily confirmed whether or not it is, and the hidden lower digit value of the total amount including tax displayed on the display unit 12 as the approximate number is also "0" and is accurate. You can check.

Therefore, according to the calculator 10 having the above configuration, it is possible to easily confirm the value of the lower digit that is hidden due to overflow when an approximate number error occurs at the time of total calculation of the tax-included amount data.

In the above description, the case where there is an input operation for the tax-included 1 calculation key 11b and the tax-included 2 calculation key 11c is taken as an example, but there is a case where there is an input operation for the tax-excluded 1 calculation key 11d and the tax-excluded 2 calculation key 11e. It is also possible to execute the same processing for. However, when the tax-excluded 1 calculation key 11d or the tax-excluded 2 calculation key 11e is operated, the CPU 21 shall display the tax-excluded amount data in preference to the tax-included amount data. Others are processed in the same manner as when the tax-included 1 calculation key 11b or the tax-included 2 calculation key 11c is operated.
In the embodiment of the present invention, the tax calculation has been described in the embodiment, but the memory is not limited to the total including tax, and each memory is used by the addition keys (M + 1, M + 2) for a plurality of memories (memory 1, memory 2). It is also applicable to electronic devices that perform calculations (addition) and then display the total value (M1 + M2) of each memory.
That is, in the present invention, when the tax-included 1 key (first calculation operation) is accepted for the input tax-excluded numerical data (first calculation data), the tax-included numerical data for the input tax-excluded numerical value is first. As the result data, it is added to the tax-included 1 total memory, and the first total data which is the result of adding one or more is stored in the first tax-included total memory (first total memory). Then, when the tax-included 2 keys (second calculation operation) are accepted for the input tax-excluded numerical data (second calculation data), the tax-included numerical data for the input tax-excluded numerical value is tax-included as the second result data. The second total data, which is the result of being added to the two total memories and one or more being added, is stored in the second total memory including tax (second total memory). Then, when the tax-included total key is operated, the first tax-included total data (first total data), which is the result of adding one or a plurality of first result data to the first total memory, and the second total The tax-included total data (total data), which is the sum of the second tax-included total data (second total data), which is the result of adding one or more second result data to the memory, is the displayable digit of the display unit. It is judged whether or not it has been exceeded. Then, when it is determined that the total total data exceeds the displayable digits of the display unit, the approximate number data of the total tax-included total data (total total data) is displayed on the display unit (approximately number display). Then, after the approximate number data of the total tax-included data (total data) is displayed on the display unit, the first total data including tax (the first total data stored in the first total memory) or the first total data stored in the first total memory is received according to the user operation. The second total data including tax (the second total data stored in the second total memory) will be displayed on the display unit. As described above, the present invention is not limited to the tax-included key for each tax rate, the tax-included total for each tax rate, and the tax-included total total, and each memory is provided by an addition key (M + 1, M + 2) for a plurality of memories (memory 1, memory 2). Is added, and then the total value (M1 + M2) of each memory is displayed.

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

In addition, the program data for realizing each method can be transmitted on the network (Internet) in the form of program code, and the program data can be transmitted from a computer (server device, etc.) connected to this network (Internet). It is also possible to take in and realize the same function as the above-described embodiment.

The invention of the present application is not limited to the above-described embodiment, and can be variously modified at the implementation stage without departing from the gist thereof. Further, the embodiments include inventions at various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed constituent requirements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the above-described embodiment or some constituent requirements are combined, the problems described in the column of problems to be solved by the invention can be solved. When the effect described in the column of effect of the invention is obtained, the configuration in which this constituent requirement is deleted or combined can be extracted as the invention.

The inventions described in the claims of the original application of the present application are described below.

[1]
A first calculation receiving means that accepts a first calculation operation for updating the first total data by adding one or more first result data to the input first calculation data to the first total data in the memory. When,
A second calculation reception that accepts a second calculation operation for updating the second total data by adding one or more second result data to the input second calculation data to the second total data in the memory. Means and
The updated first total data, which is the result of adding the first result data to the first total data in the memory, and the result of adding the second result data to the second total data in the memory. A display digit determination means for determining whether or not the total calculation data calculated with the updated second total data exceeds the displayable digits of the display unit.
When the display digit determination means determines that the total calculation data exceeds the displayable digits of the display unit, the approximate number display control means for displaying the approximate number data of the total calculation data on the display unit.
When the approximate number data of the total calculation data is displayed on the display unit by the approximate number display control means, the updated first total data or the updated first total data stored in the memory is stored in accordance with the user operation. The individual total display control means for displaying the second total data on the display unit, and
A computing device equipped with.

[2]
The first calculation receiving means is a first tax calculation receiving means that accepts a first tax calculation operation corresponding to the first tax rate.
The second calculation receiving means is a second tax calculation receiving means that accepts a second tax calculation operation corresponding to the second tax rate.
When the first tax calculation operation is accepted by the first tax calculation receiving means for the tax-excluded amount data that has been input and displayed on the display unit, the first tax-included amount data is displayed based on the first tax rate. The first tax-included amount calculation method to calculate,
When the second tax calculation operation is accepted by the second tax calculation receiving means for the tax-excluded amount data that has been input and displayed on the display unit, the second tax-included amount data is calculated based on the second tax rate. The second tax-included amount calculation method to calculate,
The updated first total is the sum of the first tax-included amount data calculated by the first tax-included amount calculation means or a plurality of the first tax-included amount data calculated by the first tax-included amount calculation means. The first tax-included total amount storage control means to be stored in the memory as the first tax-included total amount data, which is data, and
The updated second total is the sum of the second tax-included amount data calculated by the second tax-included amount calculation means or the plurality of the second tax-included amount data calculated by the second tax-included amount calculation means. The second tax-included total amount storage control means for storing the data as the second tax-included total amount data in the memory, and
With more
In the display digit determining means, the tax-included total amount data, which is the sum of the first tax-included total amount data and the second tax-included total amount data stored in the memory, exceeds the displayable digits of the display unit. Judge whether or not
The approximate number display control means displays the approximate number data of the tax-included total amount data on the display unit when it is determined by the display digit determination means that the tax-included total amount data exceeds the displayable digits of the display unit. Let me
The individual total display control means is stored in the memory in response to a user operation when the approximate number data of the total amount data including tax is displayed on the display unit by the approximate number display control means. A tax-excluded total display control means for displaying 1 tax-included total amount data or the second tax-included total amount data on the display unit is provided.
The computing device according to [1].

[3]
Equipped with a tax calculation total reception means that accepts tax calculation total operations
The display digit determination means is
When the tax calculation total operation is received by the tax calculation total receiving means, the total tax-included total amount stored in the memory is the sum of the first tax-included total amount data and the second tax-included total amount data. Has a tax-included total calculation means to calculate data,
It is determined whether or not the total amount data including tax calculated by the total amount including tax means exceeds the displayable digits of the display unit.
The computing device according to [2].

[4]
When the display digit determination means determines that the tax-included total amount data exceeds the displayable digits of the display unit, the approximate number display control means adds an error symbol to the approximate number data of the tax-included total amount data. It has an approximate number error display control means to be displayed on the display unit.
The computing device according to [3].

[5]
In the tax-excluded total display control means, the approximate number data of the total tax-included total amount data is displayed on the display unit by the approximate number display control means, and the error displayed by the approximate number error display control means according to a user operation. When the display of the symbol is canceled, (1) When the first tax calculation operation is received by the first tax calculation receiving means, the first tax-included total amount data stored in the memory is displayed. (2) When the second tax calculation operation is received by the second tax calculation receiving means, the second tax-included total amount data stored in the memory is displayed on the display unit. ,
The computing device according to [4].

[6]
When the tax-included total amount data is calculated by the tax-included total amount calculation means in response to the reception of the tax-calculated total operation by the tax-calculated total receiving means, the post-tax mode setting means for setting the post-tax mode is used. Prepare,
When the first tax calculation receiving means receives the first tax calculation operation in the state where the post-tax mode is set by the post-tax mode setting means, the tax-excluded total display control means is used. When the first tax-included total amount data stored in the memory is displayed on the display unit and the second tax calculation operation is received by the second tax calculation receiving means, it is stored in the memory. Display the total amount data including the second tax on the display unit.
The computing device according to [5].

[7]
With the display unit
A storage means including the memory and
The computing device according to any one of [1] to [6].

[8]
The memory is
The first total memory in which the first total data is stored and
The second total memory in which the second total data is stored and
The computing device according to any one of [1] to [7].

[9]
Accepting the first calculation operation for updating the first total data by adding one or more first result data to the input first calculation data to the first total data in the memory.
Accepting a second calculation operation for updating the second total data by adding one or more second result data to the input second calculation data to the second total data in the memory.
The updated first total data, which is the result of adding the first result data to the first total data in the memory, and the result of adding the second result data to the second total data in the memory. It is determined whether or not the total calculation data calculated with the updated second total data exceeds the displayable digits of the display unit.
When it is determined that the total calculation data exceeds the displayable digits of the display unit, the approximate number data of the total calculation data is displayed on the display unit.
After the approximate number data of the total calculation data is displayed on the display unit, the updated first total data or the updated second total data stored in the memory is displayed in response to a user operation. Display on the display
Method of calculation.

[10]
Computer,
A first calculation receiving means that accepts a first calculation operation for updating the first total data by adding one or more first result data to the input first calculation data to the first total data in the memory. ,
A second calculation reception that accepts a second calculation operation for updating the second total data by adding one or more second result data to the input second calculation data to the second total data in the memory. means,
The updated first total data, which is the result of adding the first result data to the first total data in the memory, and the result of adding the second result data to the second total data in the memory. A display digit determination means for determining whether or not the total calculation data calculated with the updated second total data exceeds the displayable digits of the display unit.
When the display digit determining means determines that the total calculation data exceeds the displayable digits of the display unit, the approximate number display control means for displaying the approximate number data of the total calculation data on the display unit.
When the approximate number data of the total calculation data is displayed on the display unit by the approximate number display control means, the updated first total data or the updated first total data stored in the memory is stored in accordance with the user operation. Individual total display control means for displaying the second total data on the display unit,
A computer-readable program to function as.

10 ... Calculator, 11 ... Key input unit, 11b ... 1 calculation key including tax, 11c ... 2 calculation keys including tax, 11f ... Total tax calculation key, 11x ... [C] (error cancellation) key, 12 ... Display unit, 21 ... CPU , 22 ... Memory, 22a ... Calculation processing program, 22b ... Tax rate 1 total memory area, 22c ... Tax rate 2 total memory area, 22d ... Tax total memory area, 22e ... Tax total post-tax mode data.

Claims (10)

A first calculation receiving means that accepts a first calculation operation for updating the first total data by adding one or more first result data to the input first calculation data to the first total data in the memory. When,
A second calculation reception that accepts a second calculation operation for updating the second total data by adding one or more second result data to the input second calculation data to the second total data in the memory. Means and
The updated first total data, which is the result of adding the first result data to the first total data in the memory, and the result of adding the second result data to the second total data in the memory. is a display digit determining means for grand total data obtained by summing a second total data updated to determine whether exceeds a displayable digit of the display unit,
When the display digit determining means determines that the total data exceeds the displayable digits of the display unit, the approximate number display control means for displaying the approximate number data of the total data on the display unit.
When the approximate number data of the total sum data is displayed on the display unit by the approximate number display control means, the updated first total data or the updated first total data stored in the memory is stored in accordance with the user operation. A calculation device including an individual total display control means for displaying the second total data on the display unit. The first calculation receiving means is a first tax calculation receiving means that accepts a first tax calculation operation corresponding to the first tax rate.
The second calculation receiving means is a second tax calculation receiving means that accepts a second tax calculation operation corresponding to the second tax rate.
When the first tax calculation operation is accepted by the first tax calculation receiving means for the tax-excluded amount data that has been input and displayed on the display unit, the first tax-included amount data is displayed based on the first tax rate. The first tax-included amount calculation method to calculate,
When the second tax calculation operation is accepted by the second tax calculation receiving means for the tax-excluded amount data that has been input and displayed on the display unit, the second tax-included amount data is calculated based on the second tax rate. The second tax-included amount calculation method to calculate,
The updated first total is the sum of the first tax-included amount data calculated by the first tax-included amount calculation means or a plurality of the first tax-included amount data calculated by the first tax-included amount calculation means. The first tax-included total amount storage control means to be stored in the memory as the first tax-included total amount data, which is data, and
The updated second total is the sum of the second tax-included amount data calculated by the second tax-included amount calculation means or the plurality of the second tax-included amount data calculated by the second tax-included amount calculation means. Further provided with a second tax-included total amount storage control means for storing the second tax-included total amount data as data in the memory.
In the display digit determining means, the tax-included total amount data, which is the sum of the first tax-included total amount data and the second tax-included total amount data stored in the memory, exceeds the displayable digits of the display unit. Judge whether or not
When the display digit determining means determines that the tax-included total amount data exceeds the displayable digits of the display unit, the approximate number display control means obtains the approximate number data of the tax-included total amount data. Displayed on the display unit as approximate number data of
The individual total display control means is stored in the memory in response to a user operation when the approximate number data of the total amount data including tax is displayed on the display unit by the approximate number display control means. The calculation device according to claim 1, further comprising a tax-excluded total display control means for displaying 1 tax-included total amount data or the second tax-included total amount data on the display unit. Equipped with a tax calculation total reception means that accepts tax calculation total operations
The display digit determination means is
When the tax calculation total operation is received by the tax calculation total receiving means, the total tax-included total amount stored in the memory is the sum of the first tax-included total amount data and the second tax-included total amount data. Has a tax-included total calculation means to calculate data,
The calculation device according to claim 2, wherein it is determined whether or not the total amount data including tax calculated by the total amount including tax means exceeds the displayable digits of the display unit. When the display digit determination means determines that the tax-included total amount data exceeds the displayable digits of the display unit, the approximate number display control means adds an error symbol to the approximate number data of the tax-included total amount data. The calculation device according to claim 3, further comprising an approximate number error display control means to be displayed on the display unit. In the tax-excluded total display control means, the approximate number data of the total tax-included total amount data is displayed on the display unit by the approximate number display control means, and the error displayed by the approximate number error display control means according to a user operation. When the display of the symbol is canceled, (1) When the first tax calculation operation is received by the first tax calculation receiving means, the first tax-included total amount data stored in the memory is displayed. (2) When the second tax calculation operation is received by the second tax calculation receiving means, the second tax-included total amount data stored in the memory is displayed on the display unit. , The computing device according to claim 4. When the tax-included total amount data is calculated by the tax-included total amount calculation means in response to the reception of the tax-calculated total operation by the tax-calculated total receiving means, the post-tax mode setting means for setting the post-tax mode is used. Prepare,
When the first tax calculation operation is accepted by the first tax calculation receiving means in a state where the post-tax mode is set by the post-tax mode setting means, the tax-excluded total display control means is used. When the first tax-included total amount data stored in the memory is displayed on the display unit and the second tax calculation operation is received by the second tax calculation receiving means, it is stored in the memory. The calculation device according to claim 5, wherein the second tax-included total amount data is displayed on the display unit. With the display unit
The calculation device according to any one of claims 1 to 6, further comprising a storage means including the memory. The memory is
The first total memory in which the first total data is stored and
The computing device according to any one of claims 1 to 7, further comprising a second total memory in which the second total data is stored. Accepting the first calculation operation for updating the first total data by adding one or more first result data to the input first calculation data to the first total data in the memory.
Accepting a second calculation operation for updating the second total data by adding one or more second result data to the input second calculation data to the second total data in the memory.
The updated first total data, which is the result of adding the first result data to the first total data in the memory, and the result of adding the second result data to the second total data in the memory. in it, the total sum data obtained by adding a second total data updated is determined whether exceeds a displayable digit of the display unit,
When it is determined that the total total data exceeds the displayable digits of the display unit, the approximate number data of the total total data is displayed on the display unit.
After the approximate number data of the total sum data is displayed on the display unit, the updated first total data or the updated second total data stored in the memory is displayed in response to a user operation. A calculation method to be displayed on the display unit. Computer,
A first calculation receiving means that accepts a first calculation operation for updating the first total data by adding one or more first result data to the input first calculation data to the first total data in the memory. ,
A second calculation reception that accepts a second calculation operation for updating the second total data by adding one or more second result data to the input second calculation data to the second total data in the memory. means,
The updated first total data, which is the result of adding the first result data to the first total data in the memory, and the result of adding the second result data to the second total data in the memory. in it, the second total data and the display digit determining means for grand total data obtained by summing determines whether exceeds a displayable digit display portion that has been updated,
When the display digit determining means determines that the total data exceeds the displayable digits of the display unit, the approximate number display control means for displaying the approximate number data of the total data on the display unit.
When the approximate number data of the total sum data is displayed on the display unit by the approximate number display control means, the updated first total data or the updated first total data stored in the memory is stored in accordance with the user operation. A computer-readable program for functioning as an individual total display control means for displaying the second total data on the display unit.

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