JP2018156456A - Computing device, computing method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a column number easily understood by a user according to re-calculation operation even if a change is re-calculated by inputting a new amount of a deposit repeatedly after calculating the change by inputting the amount of a deposit in a computing device.SOLUTION: When numerical data are inputted again immediately after change data are calculated once, the numerical data inputted again are displayed in association with column number (tentative display) data "---" since it is unclear whether the numerical data are data on the amount of a deposit for re-calculating change data or numerical data for next calculation in a column number display mode "1". When a [CHANGE] (change function) key is inputted after this, the numerical data inputted again are overwritten and saved as data on the amount of a deposit. When computation data of [+][-][×][÷] are inputted, the numerical data inputted again are stored in accordance with a next column number as numerical data for next calculation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a calculation device, a calculation method, and a control program having a change calculation function.

  2. Description of the Related Art Conventionally, an electronic cash register that calculates a customer's payment amount at a store or the like, inputs a deposit amount, calculates a change, and displays the amount or the like has been considered (see, for example, Patent Document 1).

  In addition, even with a calculator, a product has been developed that displays a calculation result by entering a calculation formula, and then calculates and displays a change by simply entering the deposit amount and operating the [CHANGE] key. Has been.

  Then, in accordance with the operation for calculating the payment amount and the change, the calculation data of the calculation process is changed to a line number that increases in order each time calculation data such as addition, multiplication, calculation execution, change, etc. is input. Calculators that have a function to display them in association with each other are also considered.

JP 09-035143 A

  However, the conventional calculation device cannot display the line number and perform fishing calculation in an easy-to-understand manner.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a calculation device, a calculation method, and a control program for displaying line numbers so that the change calculation can be easily understood. To do.

  The calculation apparatus according to the present invention includes a payment amount calculation unit that calculates payment amount data based on calculation data input in response to a user operation, and a user operation after the payment amount data is calculated by the payment amount calculation unit. And a first change calculation means for calculating first change data obtained by subtracting the payment amount data from the first numerical data when a first operation is performed by the user in a state where the first numerical data is input according to Display the display data including the calculation data, the payment amount data, the first numerical data, and the first change data, and correspond to each row number that is sequentially updated when the display data is displayed. Calculation data display control means for displaying the first change data in response to a user operation in a state where the first change data is displayed. If the value data is input, it is intended to be displayed together with the temporary display data in place of the line number that is the update and the second numerical data.

  According to the present invention, after calculating the fishing amount by inputting the deposit amount, even when a new deposit amount is input and the fishing is recalculated, the calculation state is easily understood by the user according to the recalculation operation. It becomes possible to display.

The front view which shows the external appearance structure of the calculator 10 (Calculator 10A with a printer, General calculator 10B) which concerns on embodiment of the calculation apparatus of this invention. The block diagram which shows the structure of the electronic circuit of 10 A of said calculators with a printer. The figure which shows the specific example (1st Embodiment (line number display modes 1-3)) of the calculation data preserve | saved in the calculation data memory 22c of the said calculator 10A with a printer. The figure which shows the specific example (2nd Embodiment (line number display mode 4)) of the calculation data preserve | saved in the calculation data memory 22c of the said calculator 10A with a printer. The flowchart which shows the calculation data display process (the 1) of 10 A of said calculators with a printer. The flowchart which shows the calculation data display process (the 2) of the said calculator 10A with a printer. The flowchart which shows the calculation data display process (the 3 (line number display mode switching process)) of the said calculator 10A with a printer. The flowchart which shows the row number temporary display process (SA) in the said calculation data display process (the 1). The figure which shows the display operation | movement according to user operation in the said calculation data display process (the 3 (line number display mode switching process)). The figure which shows the display / printing operation | movement according to user operation of 1st Embodiment (line number display mode "1") of the said calculation data display process. It is a figure which shows the display operation according to user operation of 1st Embodiment (line number display mode "2" "3") of the said calculation data display process, The figure (A1)-(A13) is line number display mode. The figure which shows the display operation according to "2", The figure (B1)-(B13) is a figure which shows the display operation according to line number display mode "3".

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view showing an external configuration of a calculator 10 according to an embodiment of a computing device of the present invention.

  In this embodiment, the calculator 10 is realized as a calculator with a printer 10A shown in FIG. 1A and a general calculator 10B shown in FIG. 1B. The calculators 10A and 10B can execute substantially the same processing except for printing except for whether or not a printer is attached.

  The calculator 10 is configured as the calculator with printer 10A and the general calculator 10B, and has a calculation function (implemented with a calculation data display processing program), a personal computer, a tablet computer, a smartphone, a mobile phone, a touch panel PDA ( personal digital assistants), electronic books, portable game machines, and the like.

  Note that a calculator such as the calculator 10 that is not equipped with physical keys (buttons) displays a software keyboard similar to the keys of the calculator 10, and performs calculation processing according to key operations on the software keyboard. Run. In addition, a computing device such as the calculator with printer 10A that is not mounted with a printing device is connected to an external printing device by short-range wireless communication or the like, and transmits a printing control signal and printing data to the printing device. Execute print processing.

  A printer-equipped calculator 10A shown in FIG.

  In the calculator 10A with a printer in this embodiment, in addition to normal calculation functions such as addition, subtraction, multiplication, and division, a display function, and a printing function, numerical data input according to a user operation and “+”, “−”, “×”, and “÷”. "=" To execute the calculation of the total (calculation result) data based on the operation data of "", the change function to calculate the change data from the deposit amount data for the payment amount data which is the total (calculation result) data “CHANGE”, a calculation data storage function for storing a series of calculation data including a combination of the calculation function and the execution function “=” and the change function “CHANGE”, and the calculation data stored by the calculation data storage function is printed. A saved data printing function and the like are provided.

  More specifically, numerical data input according to a user operation, calculation data “+”, “−”, “×”, “÷” input according to a user operation, and an execution input according to the user operation The function data “=” is stored as calculation data in a calculation data memory 22c, which will be described later. When the key operation of the execution function “=” is received, calculation of the total (calculation result) data is executed, and the total ( Payment amount data, which is calculation results) data, is stored in association with the calculation data stored in the calculation data memory 22c. Also, when the numeric data as deposit amount data input according to the user operation and the key operation of the change function “CHANGE” according to the user operation are received, the deposit amount data, the change function “CHANGE” data and the change data are Are stored in association with the calculation data stored in the calculation data memory 22c. Then, the calculation data stored in the calculation data memory 22c is printed by the stored data printing function, and the total (calculation result) data obtained by summing the calculation data is printed, and further associated with the change function “CHANGE”. The deposit amount data in the calculated data and the change data obtained by subtracting the payment amount data as the total (calculation result) data from the deposit amount data are printed.

  The calculation data storage function of the calculator 10A according to the present embodiment is a combination of numerical data and operation data “+”, “−”, “×”, “÷”, numerical data, and execution function data “=” in accordance with a user operation. When a series of calculation data consisting of a combination of numerical data (deposit amount data) and change function data “CHANGE” is sequentially input and displayed, calculation is executed according to the input of the execution function data “=”. When the total (calculation result) data displayed is displayed and when the change data calculated in response to the input of the change function data “CHANGE” is displayed, the calculated data displayed is calculated as described above. The data memory 22c has a line number display function for displaying the line numbers of the storage destinations to be stored in order, and the numeric data (deposit amount) immediately after the change function data “CHANGE” is input. Data) and change function data “CHANGE”, when the calculation data is input and displayed, the re-input calculation data and the line number where the change data is stored are displayed to the user in an easy-to-understand manner. It has a temporary number display function.

  The calculator 10 with a printer includes a key input unit 11 on the front side of a place-type main body case that is easy to operate on a desk, and includes a display unit 12 and a printing unit 13 on the back side of the key input unit 11.

  The key input unit 11 is provided with numeric keys, calculation keys, execution function keys, fishing function keys, printing function keys, and other function keys.

  The numerical keys include a plurality of keys corresponding to, for example, [00] [0] to [9]. The calculation keys include a plurality of keys corresponding to, for example, a [+] (addition) key, a [−] (subtraction) key, a [×] (multiplication) key, and a [÷] (division) key. The function key is a [=] (equal) key.

  The change function key includes a [CHANGE] (change function) key 11d that uses the input numerical data as deposit amount data and subtracts the payment amount data as the total data to calculate the change data.

  The print function keys include a [PRT] (print mode) key 11a and a [REPRINT] (stored data print) key 11e. The [PRT] (print mode) key 11a switches the print mode ON / OFF.

  Other function keys include, for example, an all clear key ([AC] key 11b), a clear key ([C] key), and the like.

  The display unit 12 comprises a dot matrix type liquid crystal display unit. The display unit 12 displays numerical data input by operating the keys of the key input unit 11 and numerical data of calculation results. In the status display area provided along the side of the display unit 12, various statuses such as the line number of the storage location of the calculation data being displayed and the content of the numerical data being displayed (change “CHANGE”) are displayed. Numbers, letters, and symbols (symbols) are displayed.

  The printing unit 13 includes, for example, a thermal transfer type printing mechanism, and is in a print mode ON / OFF setting state according to an operation of the [PRT] (print mode) key 11a and an operation state of the [REPRINT] key 11e. Based on this, the calculation data composed of the input numerical data and calculation data, the calculation result data such as the total (payment amount) data calculated from the calculation data and the change data are printed on the recording paper P and output.

  FIG. 2 is a block diagram showing a configuration of an electronic circuit of the calculator with printer 10A.

  The electronic circuit of the calculator 10A with a printer includes a CPU (processor) 21 that is a computer. The CPU 21 controls the operation of each part of the circuit according to a computer control program stored in the memory 22 and executes various calculation functions and calculation data printing functions according to user operations of the key input unit 11.

  The CPU (processor) 21 is connected to the key input unit 11, the display unit 12, the printing unit 13, and the memory 22, and reads a recording medium that reads data recorded on an external recording medium 23 such as a memory card. A communication unit 25 that communicates with the unit 24 and the external device (30) is also connected. In the case of the general calculator 20B, the printing unit 13 is not provided.

  The computer control program is stored in advance in the memory 22, or is read from the external recording medium 23 by the recording medium reading unit 24 and stored in the memory 22, or a Web server (program server) on the communication network N 30 is downloaded via the communication unit 25 and stored in the memory 22.

  The computer control program includes a calculation data display processing program 22a for displaying calculation data of calculation processing executed in accordance with the calculation processing program in addition to various calculation processing programs according to user operations.

  The memory 22 includes a PRINT mode memory 22b, a calculation data memory 22c, a line number data / line number temporary display data memory 22d, a line number display mode memory 22e, and a payment amount memory 22f. The general calculator 20B does not include the PRINT mode memory 22b.

  The print mode memory 22b stores print mode ON or print mode OFF setting data that is switched each time the [PRT] (print mode) key 11a is operated. In the state where the print mode is ON, printing is performed every time calculation data is input / total (payment amount) / change is confirmed (display / print instruction).

  In the calculation data memory 22c, a series of calculation data input in response to a user operation is received and stored in a memory area associated with sequentially increasing row numbers.

  3 and 4 are diagrams showing specific examples of calculation data stored in the calculation data memory 22c of the calculator with printer 10A. FIG. 3 overwrites the calculation data corresponding to the recalculation when the change data is repeatedly recalculated from different deposit amount data according to the [CHANGE] key 11d for the total (payment amount) data of the input calculation data. FIG. 4 shows a specific example of saving (first embodiment (line number display modes 1 to 3)). FIG. 4 shows different amounts of deposits according to the [CHANGE] key 11d for the total (payment amount) data of the input calculation data. It is a figure which shows the specific example (2nd Embodiment (line number display mode 4)) which preserve | saves the calculation data corresponding to the said recalculation newly newly when recalculating the change data repeatedly from data.

  In the line number data / line number temporary display data memory 22d, a calculation data storage mode for receiving and storing a series of calculation data including the numerical data and calculation data, and a reprint mode corresponding to the operation of the [REPRINT] key 11e. In each mode (saved data print mode), data of the row number of the memory area to be processed in the calculation data memory 22c is stored. In addition, the line number data / line number provisional display data memory 22d stores different deposit amount data in accordance with the [CHANGE] key 11d, in addition to the line number data of the memory area to be processed in the calculation data memory 22c. When re-calculating repetitive change data, data of a row number (temporary display) to be temporarily displayed is stored in the row number status display area of the display unit 12.

  Here, the data of the row number (provisional display) will be described.

  When numerical data as the deposit amount data is input and the numerical data is re-input immediately after the change data is calculated and displayed in accordance with the operation of the [CHANGE] (fishing function) key 11d, the re-input numerical value It is unclear whether the data is numerical data (deposit data) input to recalculate the change data or numerical data input as the operand for the next calculation.

  In this case, in the line number display mode 1, the data of the line number (temporary display) is temporarily displayed as “——” (or blank), and the line number of the storage destination of the re-input numerical data is not indicated. .

  Further, in the line number display mode 2, it is assumed that the re-input numerical data is deposit amount data for recalculating change data, and the current line number that is the storage destination of the previous change data is (- 1) Display the data of the line number (provisional display) that becomes the overwriting destination of the deposit amount data.

  In line number display mode 3, it is assumed that the re-input numerical data is numerical data input as the number of operands for the next calculation, and the current line number that is the storage destination of the last fishing data is set. (+1) The data of the new line number (provisional display) is displayed.

  In line number display mode 4, whether the re-input numerical data is deposit amount data for recalculating change data or numerical data input as the number of operands for the next calculation. Regardless, since the numerical data is stored in the memory area of the calculation data memory 22c corresponding to the data of the next row number to be sequentially updated, the data of the row number of the memory area to be processed in the calculation data memory 22c. Is displayed as it is, and display by the line number (temporary display) is not performed.

  The line number display mode memory 22e stores data of any one of the line number display modes n set according to the user operation from among the line number display modes 1 to 4.

  When the calculation data including the combination of the numerical data, the calculation data “+”, “−”, “×”, “÷” and the execution function data “=” is input to the payment amount memory 22f, the execution function The total (calculation result) data up to the numerical value input immediately before the data “=” is input is stored as the payment amount data.

  The total (calculation result) data stored in the payment amount memory 22f is stored in the initial setting process when the power is turned on, when the [AC] (all clear) key 11b is operated, or when the [= (Execution function) Cleared when the first numerical data after the key 11c is operated is input.

  In the calculator with a printer 10A configured as described above, the CPU 21 controls the operation of each part of the circuit in accordance with the instructions described in the computer control program (including the calculation data display processing program 22a), and the software and hardware cooperate. By operating and operating, various calculation functions and calculation data display / printing functions as described in the following operation description are realized.

  Next, the operation of the calculator with printer 10A having the above configuration will be described.

  5, 6 and 7 are flowcharts showing calculation data display processing (parts 1, 2, and 3 (line number display mode switching processing)) of the calculator with printer 10A.

  FIG. 8 is a flowchart showing a temporary row number display process (SA) in the calculation data display process (part 1).

  In the calculator with printer 10A, when the power is turned on in response to a user operation, the CPU 21 sets print mode (ON) setting data in the PRINT mode memory 22b as an initial setting process in response to the power on. Is stored, the operation mode is set to the calculation data storage mode, and the data of the line number “0” is stored in the line number data / line number temporary display data memory 22d (step S1).

  When the [PRT] (print mode) key 11a is operated in the print mode (ON) state (step S2 (Yes)), the print mode (ON) setting data is set to the print mode (OFF) setting. The data is switched (step S3).

  As described above, the calculator with printer 10A is set to the operation state in the print mode (ON) or the operation state in the print mode (OFF) according to the operation of the [PRT] (print mode) key 11a. Can be set by switching.

  FIG. 9 is a diagram showing a display operation corresponding to a user operation in the calculation data display process (part 3 (line number display mode switching process)).

  As shown in FIG. 9A, when the user operates the [AC] (all clear) key 11b and the [CHANGE] (changing function) key 11d at the same time (steps S4 and S5 (Yes)), the line number is changed. The display state for setting the display mode is entered. First, the setting data of the line number display mode “1” is stored in the line number display mode memory 22e as an initial setting (step S5a).

  Here, when the [=] (execution function) key 11c is operated, as shown in FIG. 9 (A) → (B) → (C) → (D) → (A), the [=] key 11c. For each operation, the line number display mode is switched and set in the order of “1” → “2” → “3” → “4” → “1” (steps S5b (Yes), S5c).

  When a key other than the [=] key 11c is operated (step S5d (Yes)), the processing returns to the processing after step S2.

(First embodiment)
FIG. 10 is a diagram showing a display / printing operation according to a user operation in the first embodiment of the calculation data display process (line number display mode “1”).

  As shown in FIG. 10A1, when the [AC] key 11b is operated (step S4 (Yes)), the data of the row number is cleared to “0” again (step S6).

  When the CPU 21 determines that the print mode (ON) state is set (step S7 (Yes)), as shown in FIG. 10 (B1), the print mode (ON) state [ AC] (All Clear) key A normal print start mark “••••” indicating that printing is performed in response to the operation of the key 11b is printed on the recording paper P by the printing unit 13 (step S8). .

  Then, as shown in FIG. 10 (A2), when numerical data “120”, for example, a product price is input in response to a user operation of the numerical key (step S9 (Yes)), the data of the row number (+1) and updated to “01”, and the input numerical data “120” is displayed on the display unit 12 in association with the line number “01” (step S11). At this time, if the data of the row number is “0”, the content of the calculation data memory 22c is cleared and then the row number is updated to “01”.

  Here, as shown in FIG. 10 (A3), when the [+] (addition) key is operated (step S12 (Yes)), it is stored in the line number data / line number temporary display data memory 22d. The numerical data “120” displayed and the [+] (addition) key are input to the memory area of the calculation data memory 22c (see FIG. 3A) corresponding to the current line number “01”. Calculation data consisting of the calculation data “+” is stored (step S13).

  Then, the symbol “+” of the inputted calculation data “+” is displayed on the display unit 12 (step S14). In addition, when the continuous calculation which inputs the combination of the said numerical data and operation data continuously twice or more is performed, the total (calculation result) data including even the numerical data input immediately before is displayed.

  If it is determined that the print mode (ON) is in effect (step S15 (Yes)), as shown in FIG. 10 (B1), the current line number “01” in the calculation data memory 22c is set. Correspondingly stored numerical data “120” and calculation data “+” are printed on the recording paper P (step S16).

  Thereafter, as shown in FIG. 10 (A4), when numerical data “240”, which is the next commodity price, is input (step S9 (Yes)), the line number data / line number provisional display data is the same as described above. The line number stored in the memory 22d is incremented by (+1) and updated to “02”, and the input numerical data “240” is displayed on the display unit 12 in association with the line number “02”. (Step S11).

  Then, as shown in FIG. 10A5, when the [=] (execution function) key 11c is operated (step S17 (Yes)), the input numerical data "240" and the [=] key 11c Is stored in the memory area corresponding to the current line number “02” of the calculation data memory 22c (step S18).

  Then, the line number stored in the line number data / line number temporary display data memory 22d is incremented by (+1) and updated to “03”, and a series of calculation data “120 + 240 =” stored in the calculation data memory 22c. The total (calculation result) data “360” is displayed in association with the line number “03”. The total (calculation result) data “360” is stored in the memory area corresponding to the current row number “03” of the calculation data memory 22c (step S19).

  The total (calculation result) data “360” is stored in the payment amount memory 22f (step S20).

  If it is determined that the print mode (ON) is set (step S21 (Yes)), as shown in FIG. 10 (B1), the data is stored in correspondence with the row number “02” of the calculation data memory 22c. The numerical data “240”, the execution function data “=”, and the total (calculation result) data “360” stored corresponding to the current line number “03” are printed on the recording paper P. (Step S22).

  Here, in order for the user (clerk) to calculate the change for the deposit amount from the customer for the payment data “360” which is the total (calculation result) data, FIG. 10 (A6) (A7) As shown, the numerical data (first numerical data) “500” is input as the deposit amount (steps S9 and S11 (updated to the line number “04”)), and the [CHANGE] (changing function) key 11d is operated. Then (step S23 (Yes)), it is determined whether or not the function operated by the user immediately before is the change function data “CHANGE”, that is, whether or not it is immediately after the change calculation is performed (step S24). ).

  Here, since it is determined that the function operated by the user immediately before is not the change function data “CHANGE” but immediately after the change is calculated (step S24 (No)), the function shown in FIG. 10 (A6) is shown. The calculation result data “140” obtained by subtracting the payment amount data “360” stored in the payment amount memory 22f from the numerical value data (first numerical value data) “500” as the deposit amount data displayed as shown in FIG. 10 (A7), it is displayed as change data (first change data) (step S25).

  The deposit amount data “500” and the change function data “CHANGE” are stored in the memory area of the current row number “04” of the calculation data memory 22c, and the row number is incremented by (+1). The data is updated to “05” and the change data “140”, which is the calculation result data, is stored (step S26).

  When the print mode (ON) is selected (step S27 (Yes)), as shown in FIG. 10 (B2), the deposit amount data “500” and the change data “140” stored in the calculation data memory 22c. "Is printed on the recording paper P (step S28).

  Here, for example, since the customer wants to eliminate the fraction of the change data (first change data) “140”, as shown in FIG. 10 (A8), the user (clerk) gives the customer again from the customer. When the numerical data “560” as the deposited amount is input (step S9 (Yes)), the function operated by the user immediately before is the change function data “CHANGE”, that is, immediately after the change calculation is performed. Is determined (step S10 (Yes)), and the process proceeds to the temporary row number display process in FIG. 8 (step SA).

  In the line number temporary display process, first, based on the line number display mode setting data stored in the line number display mode memory 22e, the current line number display mode is any one of “1”, “2”, and “3”. Is determined (steps A1, A2).

  If it is determined that the current line number display mode is “1” (step A1 (Yes)), the line number (temporary display) data “——” is stored in the line number data / line number temporary display data memory 22d. (Or blank) is stored (step A3).

  Then, although the current line number “05” is (+1) and updated to “06”, here, as shown in FIG. 10 (A8), the input numerical data “560” is the line number. (Temporary display) Displayed in association with data "---" (step S11).

  That is, here, regarding the input numerical data “560”, the calculator 10A determines whether the numerical data “560” is numerical data (deposit amount data) input to recalculate the change data. Since it is unknown whether the numerical data is input as the operand of the next calculation, the line number (temporary display) data “-” (or blank) is displayed, and the input numerical data “ 560 ″ does not indicate the storage destination line number.

  Then, as shown in FIG. 10 (A9), when the [CHANGE] (fishing function) key 11d is operated (step S23 (Yes)), the function operated immediately before by the user is the fishing function data “CHANGE”. It is determined immediately after the change calculation is performed (that is, the current [CHANGE] (change function) key 11d is input repeatedly) (step S24 (Yes)).

  Then, the current line number “06” is (−2) and updated to “04” (step S24a), and the numerical data (the deposit amount data of this time displayed as shown in FIG. 10A8) ( Calculation result data (second change data) “200” obtained by subtracting the payment amount data “360” stored in the payment amount memory 22f from the second numerical data) “560” is as shown in FIG. 10 (A9). Are displayed again as change data (step S25).

  As shown in FIG. 3B, the deposit amount data (second numerical data) “560” and the change function data “CHANGE” are stored in the memory area of the current row number “04” of the calculation data memory 22c. And the line number is incremented by one (+1) and updated to “05”, and the fishing data (second fishing data) “200” as the calculation result data is saved by overwriting (step) S26).

  If the print mode (ON) is selected (step S27 (Yes)), as shown in FIG. 10 (B3), the deposit amount data “560” and the change data “restored in the calculation data memory 22e” are stored. 200 "is printed on the recording paper P (step S28).

  Here, as shown in FIG. 10 (A10), when the user inputs numerical data “5” as the number of operands of the next calculation (step S9 (Yes)), the change calculation is performed in the same manner as described above. (Step S10 (Yes)) and the process proceeds to the temporary line number display process in FIG. 8 (Step SA).

  Then, it is determined that the current line number display mode is “1” (step A1 (Yes)), and line number (temporary display) data “——” (or blank) is stored in the line number data / line number temporary display data memory 22d. ) Is stored (step A3).

  Then, although the current line number “05” is (+1) and updated to “06”, here, as shown in FIG. 10 (A10), the input numerical data “5” is the line number. (Temporary display) Displayed in association with data "---" (step S11).

  That is, here, regarding the input numerical data “5”, the calculator 10A determines whether the numerical data “5” is numerical data (deposit amount data) input to recalculate the change data. Since it is unknown whether the numerical data is input as the operand of the next calculation, the line number (temporary display) data “-” (or blank) is displayed, and the input numerical data “ Does not indicate the line number of the storage destination of 5 ″.

  Then, as shown in FIG. 10A11, when the [×] (multiplication) key is operated (step S12 (Yes)), the calculation data memory 22c corresponding to the current line number “06” (FIG. 3). In the memory area (see (B)), calculation data composed of the displayed numerical data “5” and operation data “×” input by the [×] (multiplication) key is stored (step S13).

  Then, the symbol “x” of the inputted calculation data “x” is displayed on the display unit 12 (step S14).

  If it is determined that the print mode (ON) is in effect (step S15 (Yes)), as shown in FIG. 10 (B3), the current line number “06” in the calculation data memory 22c is set. Correspondingly stored numerical data “5” and operation data “×” are printed on the recording paper P (step S16).

  Thereafter, as shown in FIG. 10 (A12), when the numerical data “110”, which is the number of operations for the number of operands “5”, is input (step S9 (Yes)), the current row is similarly displayed. The number is incremented by (+1) and updated to “07”, and the input numerical data “110” is displayed on the display unit 12 in association with the row number “07” (step S11).

  Then, as shown in FIG. 10A13, when the [=] (execution function) key 11c is operated (step S17 (Yes)), the input numerical data “110” and the [=] key 11c Is stored in the memory area corresponding to the current line number “07” of the calculation data memory 22c (step S18).

  Then, the current line number is incremented by (+1) and updated to “08”, a series of calculation data “5 × 110 =” stored in the calculation data memory 22c is executed, and the total (calculation result) Data “550” is displayed in association with line number “08”. The total (calculation result) data “110” is stored in the memory area corresponding to the current row number “08” of the calculation data memory 22c (step S19).

  If it is determined that the print mode is ON (step S21 (Yes)), as shown in FIG. 10 (B3), the data is stored in correspondence with the row number “07” of the calculation data memory 22c. The numerical data “110”, the execution function data “=”, and the total (calculation result) data “550” stored corresponding to the current line number “08” are printed on the recording paper P. (Step S22).

  Thereafter, in order for the user to obtain a copy of the total (calculation result) data including the payment amount data “360”, the final deposit amount data “560”, and the change data “200”, FIG. When the [REPRINT] (stored data print) key 11e is operated (step S29 (Yes)) as shown in A14), a series corresponding to the operation of the [REPRINT] key 11e as shown in FIG. 10 (B4). The stored data print start mark “... 0,...” Indicating that the calculated data is to be printed is printed on the recording paper P (step S30).

  Then, a series of calculation data stored in the calculation data memory 22c (see FIG. 3B) is read, and “120+” “240 =” is written on the recording paper P as shown in FIG. 10B4. “360 *” “560” “200C =” “5 ×” “110 =” “550” (step S31).

  As a result, for the payment amount data that is the total (calculation result) data corresponding to a series of calculation data, immediately after inputting the deposit amount data and calculating and displaying the fishing data, the different deposit amount data is re-displayed. Even if you enter numeric data (deposit amount data) to recalculate fishing data and input numeric data for the next calculation, the entered numeric data In accordance with the temporary line number display process (mode 1), display is performed in association with the line number (provisional display) data “---” (or blank), so that the calculator 10A stores the input numerical data. It can clearly show that the destination is unknown at this time.

  Therefore, even if you re-calculate fishing after repeatedly entering a new deposit amount after entering the deposit amount and calculating fishing, you can display line numbers that are easy to understand for the user according to the recalculation operation It becomes possible.

  In the case of the general calculator 10B instead of the calculator 10A with the printer, the calculation data display process (steps S2, S3, S7, S8, S15, S16, S21, S22, S27 to S31 / FIG. 10 (A14) (B1 to B4)) is not provided, and other processes are the same.

  FIG. 11 is a diagram showing a display operation in accordance with a user operation in the first embodiment of the calculation data display process (line number display modes “2” and “3”), and (A1) to (A13) in FIG. The figure which shows the display operation according to line number display mode "2", The figure (B1)-(B13) is a figure which shows the display operation according to line number display mode "3".

(Line number display mode “2”)
In the display operation corresponding to the line number display mode “2” shown in FIGS. 11A1 to 11A13, the display corresponding to the line number display mode “1” shown in FIGS. 10A1 to 10A13 is performed. The display operation of line number (temporary display) data (FIG. 11 (A8) (A10)) differs when the numerical data is input immediately after the change data is once calculated and displayed.

  That is, as shown in FIG. 11 (A6), the total amount (calculation result) data (payment amount data) “360” calculated as shown in FIGS. 11 (A1) to (A5) is used as deposit amount data. Is input (steps S9 and S11), and the [CHANGE] (fishing function) key 11d is operated as shown in FIG. 11 (A7) (step S23 (Yes)).

  Then, the calculation result data “140” obtained by subtracting the payment amount data “360” from the numerical data (first numerical data) “500” as the deposit amount data is displayed as change data (first change data) (step). S25) The deposit amount data “500” and the change function data “CHANGE” are stored in the memory area of the current row number “04” (see FIG. 3A), and the row number is (+1). Then, it is updated to “05”, and the change data “140” as the calculation result data is stored (step S26).

  Here, as shown in FIG. 11 (A8), when the user (store clerk) inputs numerical data (second numerical data) “560” as a deposit amount newly provided by the customer (step S9 (Yes)). In the same manner as described above, it is determined that the function operated by the user immediately before is the change function data “CHANGE”, that is, immediately after the change is calculated (step S10 (Yes)), and the line number in FIG. The process proceeds to a temporary display process (step SA).

  If it is determined that the current line number display mode is “2” in the temporary line number display process (step A2 (Yes)), the current line number “05” is stored in the line number data / line number temporary display data memory 22d. The line number (temporary display) data “04” in which “-1” is (−1) is stored (step A4).

  Then, although the current line number “05” is incremented by (+1) and updated to “06”, here, as shown in FIG. 11 (A8), the input numerical data (deposit amount data) “ 560 "is displayed in association with the line number (temporary display) data" 04 "(step S11).

  That is, here, regarding the input numerical data (second numerical data) “560”, the calculator 10A assumes that it is deposit amount data for recalculating the fishing data, and the previous fishing data (first data) (1 change data) The line number (temporary display) data “04” to be the overwriting destination of the deposit amount data obtained by (−1) the line number “05” which is the storage destination of “140” is displayed.

  Then, as shown in FIG. 11 (A9), when the [CHANGE] (fishing function) key 11d is operated (step S23 (Yes)), the function operated by the user immediately before is the fishing function data “CHANGE”. It is determined immediately after the change calculation is performed (that is, the current [CHANGE] (change function) key 11d is input repeatedly) (step S24 (Yes)).

  Then, the current line number “06” is (−2) and updated to “04” (step S24a), and the numerical data “as deposit amount data” displayed as shown in FIG. 11 (A8) is displayed. The calculation result data (second change data) “200” obtained by subtracting the payment amount data “360” stored in the payment amount memory 22f from “560” is renewed as change data as shown in FIG. 11 (A9). It is displayed (step S25).

  Similarly to the above, as shown in FIG. 3B, in the memory area of the current row number “04” of the calculation data memory 22c, the deposit amount data (second numerical data) “560” and the change function The data “CHANGE” is overwritten and saved, and the line number is incremented by (+1) and updated to “05”, and the fishing data (second fishing data) “200” as the calculation result data is overwritten and saved. (Step S26).

  Here, as shown in FIG. 11 (A10), when the user inputs numerical data “5” as the number of operands of the next calculation (step S9 (Yes)), the change calculation is performed in the same manner as described above. (Step S10 (Yes)) and the process proceeds to the temporary line number display process in FIG. 8 (Step SA).

  Then, it is determined that the current line number display mode is “2” (step A2 (Yes)), and the line where the current line number “05” is (−1) in the line number data / line number temporary display data memory 22d. Number (temporary display) data “04” is stored (step A4).

  Then, although the current line number “05” is (+1) and updated to “06”, here, as shown in FIG. 11 (A10), the input numerical data “5” is the line number. (Temporary display) Displayed in association with data “04” (step S11).

  That is, here, the input numerical data “5” is assumed to be the deposit amount data for recalculating the change data for the calculator 10A, and is the storage destination of the previous change data “200”. The line number (temporary display) data “04” obtained by subtracting the line number “05” from (−1) is displayed.

  Then, as shown in FIG. 11 (A11), when the [×] (multiplication) key is operated (step S12 (Yes)), the calculation data memory 22c corresponding to the current line number “06” (FIG. 3). In the memory area (see (B)), calculation data composed of the displayed numerical data “5” and operation data “×” input by the [×] (multiplication) key is stored (step S13).

  As a result, immediately after entering the deposit amount data and calculating and displaying the fishing data for the payment amount data which is the total (calculation result) data corresponding to a series of calculation data, different deposit amount data is displayed. Even if numerical data (deposit amount data) for recalculating fishing data and inputting numerical data for the next calculation may be input, the line number provisional display process ( According to mode 2), the input numerical data is assumed to be deposit amount data for recalculating the change data, and is the storage destination of the deposit amount data input with the calculation of the last change data. It is displayed in association with number (temporary display) data “04”. For this reason, as the main calculator 10A, it is possible to clearly indicate that the storage location of the input numerical data is a storage location that overwrites the deposit amount data for recalculation of change data at the present time.

  Therefore, even if you re-calculate fishing after repeatedly entering a new deposit amount after entering the deposit amount and calculating fishing, you can display line numbers that are easy to understand for the user according to the recalculation operation It becomes possible.

(Line number display mode “3”)
Also in the display operation corresponding to the line number display mode “3” shown in FIGS. 11B1 to 11B13, as in the case of the line number display mode “2”, FIGS. 10A1 to 10A13 are performed. In contrast to the display operation corresponding to the line number display mode “1” shown in FIG. 1, the display operation of the line number (temporary display) data when the numerical data is input immediately after the change data is once calculated and displayed (see FIG. 11 (B8) (B10)) is different.

  That is, as shown in FIG. 11 (B6), the total amount (calculation result) data (payment amount data) “360” calculated as shown in FIGS. Numerical data (first numerical data) “500” is input (steps S9 and S11), and the [CHANGE] (fishing function) key 11d is operated as shown in FIG. 11 (B7) (step S23 (Yes)). ).

  Then, calculation result data (first change data) “140” obtained by subtracting the payment amount data “360” from the numerical data (first numerical data) “500” as the deposit amount data is displayed as change data (step) S25) The deposit amount data “500” and the change function data “CHANGE” are stored in the memory area of the current row number “04” (see FIG. 3A), and the row number is (+1). Then, it is updated to “05”, and the change data (first change data) “140”, which is the calculation result data, is stored (step S26).

  Here, as described above, as shown in FIG. 11 (B8), when the user (store clerk) inputs numerical data “560” (second numerical data) as a deposit amount newly provided by the customer (step 2). S9 (Yes)), it is determined that the function operated by the user immediately before that is the fishing function data “CHANGE”, that is, immediately after the change calculation is performed (Step S10 (Yes)), and the line number in FIG. The process proceeds to a temporary display process (step SA).

  In the temporary line number display process, if it is determined that the current line number display mode is “3” (step A2 (No)), the current line number “05” is stored in the line number data / line number temporary display data memory 22d. The line number (temporary display) data “06” obtained by adding “+1” to “” is stored (step A5).

  Then, although the current line number “05” is (+1) and updated to “06”, here, as shown in FIG. 11 (B8), the input numerical data (deposited amount data) “ 560 "is displayed in association with the line number (temporary display) data" 06 "(step S11).

  That is, here, it is assumed that the input numerical data “560” (second numerical data) is the numerical data input as the operand of the next calculation for the calculator 10A, and the last change data (First change data) The data “06” of a new line number (provisional display) obtained by adding (+1) the line number “05” which is the storage destination of “140” is displayed.

  Then, as shown in FIG. 11 (B9), when the [CHANGE] (fishing function) key 11d is operated (step S23 (Yes)), the function operated immediately before by the user is the fishing function data “CHANGE”. It is determined immediately after the change calculation is performed (that is, the current [CHANGE] (change function) key 11d is input repeatedly) (step S24 (Yes)).

  Then, the current line number “06” is (−2) and updated to “04” (step S24a), and the numerical data (the current deposit amount data displayed as shown in FIG. 11B8) ( Calculation result data (second change data) “200” obtained by subtracting the payment amount data “360” stored in the payment amount memory 22f from the second numerical data) “560” is as shown in FIG. 11 (B9). Are displayed again as change data (step S25).

  Similarly to the above, as shown in FIG. 3B, in the memory area of the current row number “04” of the calculation data memory 22c, the deposit amount data (second numerical data) “560” and the change function The data “CHANGE” is overwritten and saved, and the line number is incremented by (+1) and updated to “05”, and the fishing data (second fishing data) “200” as the calculation result data is overwritten and saved. (Step S26).

  Here, as shown in FIG. 11 (B10), when the user inputs numerical data “5” as the number of operands of the next calculation (step S9 (Yes)), the change calculation is performed in the same manner as described above. (Step S10 (Yes)) and the process proceeds to the temporary line number display process in FIG. 8 (Step SA).

  Then, it is determined that the current line number display mode is “3” (step A2 (No)), and the line number obtained by adding (+1) the current line number “05” in the line number data / line number temporary display data memory 22d. (Tentative display) Data “06” is stored (step A5).

  Then, although the current line number “05” is (+1) and updated to “06”, here, as shown in FIG. 11 (B10), the input numerical data “5” is the line number. (Temporary display) Displayed in association with data “06” (step S11).

  That is, also here, regarding the input numerical data “5”, it is assumed that the calculator 10A is the numerical data input as the operand of the next calculation, and the storage destination of the immediately preceding fishing data “200” is assumed. The data “06” of the new row number (provisional display) obtained by adding (+1) the row number “05” is displayed.

  Then, as shown in FIG. 11 (B11), when the [×] (multiplication) key is operated (step S12 (Yes)), the calculation data memory 22c corresponding to the current line number “06” (FIG. 3). In the memory area (see (B)), calculation data composed of the displayed numerical data “5” and operation data “×” input by the [×] (multiplication) key is stored (step S13).

  As a result, immediately after entering the deposit amount data and calculating and displaying the fishing data for the payment amount data which is the total (calculation result) data corresponding to a series of calculation data, different deposit amount data is displayed. Even if numerical data (deposit amount data) for recalculating fishing data and inputting numerical data for the next calculation may be input, the line number provisional display process ( According to mode 3), the input numerical data is assumed to be numerical data input as the number of operands of the next calculation, and a new line number (temporary) obtained by adding (+1) the current line number “05”. Display) Displayed in association with data “06”. Therefore, the present calculator 10A can clearly indicate that the storage location of the input numerical data is the storage location of the numerical data input for the next calculation at the present time.

  Therefore, even if you re-calculate fishing after repeatedly entering a new deposit amount after entering the deposit amount and calculating fishing, you can display line numbers that are easy to understand for the user according to the recalculation operation It becomes possible.

  In the calculation data display process in the line number display mode “3”, as shown in FIG. 11 (B8), numerical data (here, deposit amount data) “560” input immediately after the change data is calculated. "Is assumed to be numeric data input as the operand of the next calculation, and the current line number" 05 "is displayed in association with the line number (provisional display) data" 06 "obtained by adding (+1) ( S9, S10, SA, S11). Then, as shown in FIG. 11 (B9), in accordance with the operation of the [CHANGE] (fishing function) key 11d, the input numerical data (deposit amount data) “ 560 ”and the change function data“ CHANGE ”are overwritten and saved in the memory area of the line number“ 04 ”which is the storage destination of the previous deposit amount data, and the current change data“ 200 ”is saved to the line number“ 05 ”. The memory area is overwritten and saved, and is displayed in association with the row number “05” (S23, S24, S24a, S25, S26).

  On the other hand, if it is determined that calculation of repeated change data is performed in accordance with the operation of the [CHANGE] (change function) key 11d, as shown in FIG. Forehead data) “560” is displayed in association with the storage number (overwrite destination) line number “04”, and then the current fishing data “200” is displayed as shown in FIG. By displaying in association with the line number “05”, the storage destination by overwriting from the re-input numerical data (deposit amount data) “560” to the recalculated change data “200” is displayed more easily. It is good also as a structure.

  Therefore, according to the calculator 10 (10A, 10B) having the above-described configuration, a combination of numerical data and operation data “+”, “−”, “×”, “÷”, numerical data, and execution function data “=” in accordance with a user operation. ", A series of calculation data consisting of numerical data (deposited amount) and change function data" CHANGE "are sequentially input and displayed, and the calculation is executed according to the execution function data" = " When the displayed total (calculation result) data is displayed and when the change data calculated according to the input of the change function data “CHANGE” is displayed, the displayed calculation data are sequentially displayed. There is a calculation data storage mode in which the calculation data is stored in association with the line number of the calculation data memory 22c, and each of the calculation data is displayed in association with the line number as the storage destination.

  Immediately after the change data is calculated, if the numerical data (deposit amount) and the change function data “CHANGE” are input and the change data is recalculated, the recalculation and the numeric data (deposit amount) are changed. The set of function data “CHANGE” and its change data are overwritten and stored in the data stored according to the calculation of the previous change data.

  Then, when the numerical data is re-input immediately after the change data is once calculated, the re-input numerical data is the re-calculation of the change data in the line number display mode “1”. Since it is unknown whether it is the deposit amount data or the numerical data for the next calculation, it is displayed in association with the line number (temporary display) data “-” (or blank). Further, in the line number display mode “2”, it is assumed that the re-input numerical data is deposit amount data for recalculating the change data, and the current line number that is the storage destination of the previous change data is assumed. (-1) is displayed in association with the line number (temporary display) data corresponding to the storage location of the previous deposit amount data. Further, in the line number display mode “3”, it is assumed that the re-input numerical data is the numerical data input as the operand of the next calculation, and the current change data storage destination is the current data. It is displayed in association with the line number (temporary display) data corresponding to the storage location of the next calculation data with the line number (+1).

  Thereafter, when the [CHANGE] (changing function) key 11d is input, the re-input numerical data is overwritten and saved as deposit amount data (second numerical data), and [+] [−] [× ] [÷] calculation data is input, the re-input numerical data is stored as numerical data for the next calculation in association with the next line number. In the line number display mode “1”, when [CHANGE] (a change function) is operated by the user, second change data obtained by subtracting the payment amount data from the second numerical data is calculated.

  Thereby, for example, the user can select and set one of the line number display modes “1 to 4” in advance depending on whether or not there is an opportunity to recalculate change data frequently. Even if you re-calculate fishing after repeatedly entering a new deposit amount after entering the deposit amount and calculating the fishing, it is possible to display a line number that is easy to understand for the user according to the recalculation operation become.

  When the line number display mode is set to any one of “1 to 3”, the numerical data (deposit amount data) input according to the recalculation of the change data and the recalculation change data are stored in the calculation data memory. Since the numerical data (deposited amount data) input last time 22c and the previously calculated change data are overwritten and saved, even if the change data is repeatedly calculated, the memory of the calculation data memory 22c It can be used with saving area.

  In addition, each processing method by the calculator 10 (10A, 10B) described in each embodiment, that is, the calculation data display process (parts 1 to 3) shown in the flowcharts of FIGS. Each method such as temporary line number display processing in the calculation data display processing shown in the flowchart is a program that can be executed by a computer as a memory card (ROM card, RAM card, etc.), magnetic disk (floppy (registered) (Trademark) disk, hard disk, etc.), optical disk (CD-ROM, DVD, etc.), semiconductor memory, etc., can be stored and distributed. Then, the computer (CPU) of the electronic computer having a display function reads the program recorded in the medium of the external recording device into the storage device, and the operation is controlled by the read program, so that each of the above embodiments is performed. The calculation data display function described in the embodiment can be realized, and the same processing by the method described above can be executed.

  Further, program data for realizing each of the above methods can be transmitted on the communication network (N) in the form of a program code, and from a computer device (program server) connected to the communication network (N). The above-mentioned calculation data display function can also be realized by fetching the program data into an electronic computer having a display function and storing it in a storage device.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention when it is practiced. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in each embodiment or some constituent elements are combined in different forms, the problems described in the column of the problem to be solved by the invention If the effects described in the column “Effects of the Invention” can be obtained, a configuration in which these constituent requirements are deleted or combined can be extracted as an invention.

  Hereinafter, the invention described in the scope of claims of the present application will be appended.

[Claim 1]
Payment amount calculation means for calculating payment amount data based on calculation data input in response to a user operation;
After the payment amount data is calculated by the payment amount calculation means, when the first operation is performed by the user in a state where the first numerical value data is input according to the user operation, the payment amount is calculated from the first numerical value data. First change calculation means for calculating first change data obtained by subtracting data;
Display the display data including the calculation data, the payment amount data, the first numerical data, and the first change data, and associate each row number that is sequentially updated when the display data is displayed. Calculation data display control means to be displayed,
With
When the second numerical data is input in response to a user operation in a state where the first change data is displayed, the calculated data display control means is a temporary display that replaces the second numerical data and the updated line number. Display together with data,
Computing device.

[Claim 2]
When the first operation is performed by the user in a state in which the second numerical data and the temporary display data are displayed by the calculation data display control means, the payment amount data is subtracted from the second numerical data. 2 With a second change calculation means for calculating change data,
When the second fishing data is calculated, the calculated data display control means displays the second fishing data and a line number displayed in association with the first fishing data.
The computing device according to claim 1.

[Claim 3]
Calculation data storage means for storing the input calculation data, the payment amount data, the first numerical data, and the first change data in association with each of the displayed line numbers. ,
The calculated data storage means stores the calculated second fishing data by overwriting it in association with the storage destination row number storing the first fishing data.
The calculation device according to claim 2.

[Claim 4]
The calculation data display control means displays the second fishing data and the storage destination row number storing the first fishing data together.
The computing device according to claim 3.

[Claim 5]
The calculation data display control means, when the second numerical data is input in response to a user operation in a state where the first change data is displayed,
In the first mode, as temporary display data in place of the updated line number, the line number is not displayed, a predetermined mark or a blank is displayed,
In the second mode, the line number associated with the first numerical data is displayed as temporary display data in place of the updated line number.
The computing device according to any one of claims 2 to 4.

[Claim 6]
The temporary display data is blank data or a mark other than a number,
The computing device according to claim 1.

[Claim 7]
The temporary display data is numerical data of a line number of a storage destination in which numerical data as the first numerical data is stored by the calculation data storage unit.
The computing device according to claim 3.

[Claim 8]
The temporary display data is numerical data of a line number next to a storage destination line number in which the first change data is stored by the calculation data storage unit.
The computing device according to claim 3.

[Claim 9]
The calculation device according to claim 1, wherein the first operation is a change key operation.

[Claim 10]
A payment calculation step for calculating payment data based on calculation data input in response to a user operation;
After the payment amount data is calculated by the payment amount calculation step, when a first operation is performed by the user in a state where the first numerical value data is input according to the user operation, the payment amount is calculated from the first numerical value data. A first change calculation step of calculating first change data obtained by subtracting data;
Display the display data including the calculation data, the payment amount data, the first numerical data, and the first change data, and associate each row number that is sequentially updated when the display data is displayed. Calculation data display control step to be displayed,
With
In the calculation data display control step, when the second numerical data is input in response to a user operation in a state where the first change data is displayed, the temporary display instead of the second numerical data and the updated line number is performed. Display together with data,
A calculation method characterized by that.

[Claim 11]
The computer of the computing device,
Payment amount calculation means for calculating payment amount data based on calculation data input in response to a user operation;
After the payment amount data is calculated by the payment amount calculation means, when the first operation is performed by the user in a state where the first numerical value data is input according to the user operation, the payment amount is calculated from the first numerical value data. First change calculation means for calculating first change data obtained by subtracting data;
Display the display data including the calculation data, the payment amount data, the first numerical data, and the first change data, and associate each row number that is sequentially updated when the display data is displayed. Calculation data display control means to be displayed,
Function as
When the second numerical data is input in response to a user operation in a state where the first change data is displayed, the calculated data display control means is a temporary display that replaces the second numerical data and the updated line number. Display together with data,
A computer-readable program.

DESCRIPTION OF SYMBOLS 10 ... Calculator 10A ... Calculator with printer 10B ... General calculator 11 ... Key input part 11a ... [PRT] (print mode) key 11b ... [AC] (all clear) key 11c ... [=] (execution function) key 11d ... [ [CHANGE] (changing function) key 11e... [REPRINT] (print stored data) key 12... Display section 13... Printing section P.
22 ... Memory 22a ... Calculation data display processing program 22b ... PRINT mode memory 22c ... Calculation data memory 22d ... Line number data / line number temporary display data memory 22e ... Line number display mode memory 22f ... Payment amount memory 23 ... External recording medium 24 ... Recording medium reading unit 25 ... Communication unit 30 ... Web server N ... Communication network

Claims (11)

Payment amount calculation means for calculating payment amount data based on calculation data input in response to a user operation;
After the payment amount data is calculated by the payment amount calculation means, when the first operation is performed by the user in a state where the first numerical value data is input according to the user operation, the payment amount is calculated from the first numerical value data. First change calculation means for calculating first change data obtained by subtracting data;
Display the display data including the calculation data, the payment amount data, the first numerical data, and the first change data, and associate each row number that is sequentially updated when the display data is displayed. Calculation data display control means to be displayed,
With
When the second numerical data is input in response to a user operation in a state where the first change data is displayed, the calculated data display control means is a temporary display that replaces the second numerical data and the updated line number. Display together with data,
Computing device. When the first operation is performed by the user in a state in which the second numerical data and the temporary display data are displayed by the calculation data display control means, the payment amount data is subtracted from the second numerical data. 2 With a second change calculation means for calculating change data,
When the second fishing data is calculated, the calculated data display control means displays the second fishing data and a line number displayed in association with the first fishing data.
The computing device according to claim 1. Calculation data storage means for storing the input calculation data, the payment amount data, the first numerical data, and the first change data in association with each of the displayed line numbers. ,
The calculated data storage means stores the calculated second fishing data by overwriting it in association with the storage destination row number storing the first fishing data.
The calculation device according to claim 2. The calculation data display control means displays the second fishing data and the storage destination row number storing the first fishing data together.
The computing device according to claim 3. The calculation data display control means, when the second numerical data is input in response to a user operation in a state where the first change data is displayed,
In the first mode, as temporary display data in place of the updated line number, the line number is not displayed, a predetermined mark or a blank is displayed,
In the second mode, the line number associated with the first numerical data is displayed as temporary display data in place of the updated line number.
The computing device according to any one of claims 2 to 4. The temporary display data is blank data or a mark other than a number,
The computing device according to claim 1. The temporary display data is numerical data of a line number of a storage destination in which numerical data as the first numerical data is stored by the calculation data storage unit.
The computing device according to claim 3. The temporary display data is numerical data of a line number next to a storage destination line number in which the first change data is stored by the calculation data storage unit.
The computing device according to claim 3.   The calculation device according to claim 1, wherein the first operation is a change key operation. A payment calculation step for calculating payment data based on calculation data input in response to a user operation;
After the payment amount data is calculated by the payment amount calculation step, when a first operation is performed by the user in a state where the first numerical value data is input according to the user operation, the payment amount is calculated from the first numerical value data. A first change calculation step of calculating first change data obtained by subtracting data;
Display the display data including the calculation data, the payment amount data, the first numerical data, and the first change data, and associate each row number that is sequentially updated when the display data is displayed. Calculation data display control step to be displayed,
With
In the calculation data display control step, when the second numerical data is input in response to a user operation in a state where the first change data is displayed, the temporary display instead of the second numerical data and the updated line number is performed. Display together with data,
A calculation method characterized by that. The computer of the computing device,
Payment amount calculation means for calculating payment amount data based on calculation data input in response to a user operation;
After the payment amount data is calculated by the payment amount calculation means, when the first operation is performed by the user in a state where the first numerical value data is input according to the user operation, the payment amount is calculated from the first numerical value data. First change calculation means for calculating first change data obtained by subtracting data;
Display the display data including the calculation data, the payment amount data, the first numerical data, and the first change data, and associate each row number that is sequentially updated when the display data is displayed. Calculation data display control means to be displayed,
Function as
When the second numerical data is input in response to a user operation in a state where the first change data is displayed, the calculated data display control means is a temporary display that replaces the second numerical data and the updated line number. Display together with data,
A computer-readable program.