JPH08180024A - Desk-top electronic calculator - Google Patents

Abstract

PURPOSE: To reduce the frequency of input required for calculation by substituting numerical data stored corresponding to variables for the respective variables of a stored calculation formula, executing an arithmetic operation based on the calculation formula and outputting an arithmetic result. CONSTITUTION: When calculation formula input by selecting a mode ED is ended and a setting end key 'ST' is depressed, this electronic calculator is shifted to an EX mode and checks the constitution of the calculation formula first (S1, S2 and S3). Correction is urged by the flickering of a cursor when an error is discovered in the calculation formula, and when no error is present, the calculation formula is stored, the number of the variables in the formula is checked and input standby is shifted to (S4 and S5). When data for the respective variables are inputted and a space key (in the case of the plural calculation formulas) or an equation key '=' (in the case of a single calculation formula) is depressed following data input, the number of the inputted data is checked (S6 and S7). The number of the data is collated with the number of the variables, and when it is appropriate, the data are substituted for the variables as they are and the arithmetic operation is performed corresponding to the calculation formula (S8).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desk-top electronic calculator, and more particularly to a desk-top electronic calculator (hereinafter, referred to as a calculator) which is particularly suitable for calculation of multiple data according to a predetermined calculation formula.

[0002]

2. Description of the Related Art Most of the calculators currently in use are four-law arithmetic calculators for simple addition, subtraction, multiplication and division. For example, in the slip calculation, the amount of money is individually calculated from the unit price and the quantity of each line already written in a large number of slips, and the total amount of money is calculated for each slip and for the whole slip. . In this case, the operator of the calculator looks at the slip and calculates the formula including the numerical value, "unit price x quantity".
Is input each time, and the amount of money obtained as the calculation result is posted. Next, the total amount of money is calculated by inputting the amount of money in each line for each slip and transcribed. The operator
While checking the total amount of money for a large number of slips, enter this, calculate the total amount of money for a large number of slips, and post it.

Some conventional calculators have a memory and have a function of accumulating the results obtained in each calculation. In such a calculator, first, after inputting "unit price x quantity" for each line, press the cumulative key "M +" instead of the normal equal sign, and calculate the numerical value to be entered in the amount column of each line of the slip. Get as. When the calculation of the amount columns of all the lines of one slip is completed, the memory key "MR" is pressed to obtain the numerical value of the total amount column of the slip. Then, the memory clear key "MC" is pressed, and the same operation is sequentially performed for the next slip. Subsequently, in order to obtain the total amount of money for a large number of slips, input is performed while viewing the total amount of money calculated for each slip.

[0004]

As described above, according to the conventional calculator, in order to perform the necessary slip calculation, the unit price, the operator (x) and the quantity of each line of each slip are input each time, and further, Is the total amount and operator (+) in each slip
Since it is necessary to input, it takes a lot of time to input. However, hitherto, no attempt has been made to improve the calculator focusing on this point.

Further, in the above-mentioned example of voucher calculation, when the total amount of money is obtained by summing up the total amount of money of each voucher, for example, a value different from the total amount of money once posted on the voucher is erroneously input. However, this cannot be confirmed or corrected, and in general, verification is performed by performing the calculation twice and matching the results. In the unlikely event that the results do not match, the third calculation is required, and the slip calculation requires a particularly large amount of time and labor.

In view of the above, the present invention reduces the number of inputs required for calculation when arithmetically processing a large number of data according to a desired calculation formula, and therefore, an error may occur during the input. It is an object of the present invention to provide a simple desk-top electronic calculator that can significantly reduce the time required for calculation because the value is kept low.

[0007]

In order to achieve the above object, a desk electronic calculator according to the first aspect of the present invention is a calculation formula including at least a symbol input key capable of inputting numerical data and one or more variables. When a numerical formula data corresponding to a variable included in the calculation formula stored in the calculation formula storage means is inputted, a data storage for storing the numerical data in correspondence with the variable. Means and numerical data stored in the data storage means are substituted into the respective variables of the calculation formula stored in the calculation formula storage means, a calculation is executed based on the calculation formula, and a calculation result is output. And a calculation means.

In a preferred aspect of the calculator of the first aspect of the present invention, there is provided a second arithmetic means for accumulating a plurality of arithmetic results output from the arithmetic means. In this case, it is possible to save the trouble of newly inputting the calculation results calculated for a large number of data and obtaining the total thereof, and to eliminate erroneous data input that tends to occur at that time.

Further, it is preferable that the symbol input key can further input a calculation formula, and the calculation formula is stored in the calculation formula storage means by the symbol input key. Since a desired calculation formula can be input, there is a high degree of freedom in selecting the calculation formula. Further, in this case, it is preferable that the input calculation formula is displayed on the display device, and a display for prompting the input of numerical data is made to correspond to each variable included in the calculation formula. Corresponding data can be easily input without error for many variables.

Further, it is also a preferred embodiment that the calculation formula storage means stores a plurality of calculation formulas. In this case, it is possible to input data quickly even for calculations including many calculation formulas.

According to a second aspect of the present invention, there is provided a desk-top electronic calculator,
Numeric keys for numeric input, operation code key for operator input, first end code key for inputting first end code, and second end code for inputting second end code In response to a symbol input key including a key and a first end code input subsequent to the calculation formula, an operation is performed according to the calculation formula corresponding to the first end code, and the result is first
First arithmetic means for outputting as an arithmetic value, a counter for counting the number of times of inputting the first end code, and a second end code input after two or more first end codes are input. And a second calculation means for outputting a cumulative value of the respective first calculation values respectively calculated in response to each of the first end codes as a second calculation value.

In a preferred aspect of the desk calculator according to the second aspect of the present invention, the symbol input key further includes a third end code key for inputting a third end code, and two or more second end codes are included. When the third end code key is input after the end code is input, the cumulative value of the second operation values calculated in response to each second end code is output as the third operation value. In this case, especially in the slip calculation, it is possible to easily calculate the total sum of money for a large number of slips, and the possibility of erroneous data entry that tends to occur during data entry is reduced.

Further, until the second end code or the third end code is input, at least storage means for storing the input calculation formula is provided, and the calculation formula stored in this storage means can be displayed. In this case, it is possible to easily find an error in the input data by collating the numerical value of the slip with the data in the displayed calculation formula.

In the desk-top electronic calculator of the present invention, the structure of the symbol input section is not particularly limited as long as it can input predetermined data or calculation formula. Further, the first computing means and the second computing means can mutually share the elements having the same function. Further, the calculation formula that can be input by the desktop calculator is not particularly limited, and various other calculation formulas such as addition, subtraction, multiplication and division can be input.

[0015]

In the desktop electronic calculator according to the first aspect of the present invention, it is possible to reduce the number of input items required for arithmetic processing of a large number of data according to a predetermined calculation formula. In case of, it is particularly easy to input.

Further, in the desk electronic calculator according to the second aspect of the present invention, in response to the first end code, the first operation value which is the operation result of the calculation formula corresponding to the first end code is obtained. Two
When the second end code is input subsequent to the above input of the first end code, the total of each first operation value is obtained as the second operation value by the function of the desk electronic calculator, and the input calculation is performed. Since the number of expressions is displayed, it is particularly easy to find errors that are likely to occur during data entry.

[0017]

FIG. 1 is a plan view showing a desk electronic calculator (calculator) according to an embodiment of the present invention. The calculator 10 of the present embodiment is
The frame 12 and the key input unit 1 arranged in front of the frame
4, the display unit 16, and the solar cell 18. The display unit 16 has display positions of 34 digits, each of which is divided into an upper row and a lower row.

In the key input section 14, numeral input keys "0" to "9", a decimal point moving key and a rounding key, which are found in a normal calculator, an operator input key "+" for four arithmetic operations, In addition to "-", "x", "÷", etc., a symbol input key unique to the present invention is provided. Of these, the calculation mode selection key “AP” is a key for selecting a desired calculation mode, and is used for selecting one of the calculation modes 1 (AP1) to 4 (AP4). It
In each calculation mode, the mode AP1 is preferably used for normal four arithmetic operations, the mode AP2 is particularly used for addition / subtraction of a large amount of data, the mode AP3 is preferably used for multi-data calculation corresponding to a calculation formula, and the mode AP4 is preferably used for slip calculation. .

The execution mode selection key "EX" and the data correction mode selection key "ED" are respectively an execution mode (EX mode) for inputting data and executing an operation, and data for correcting already input data. It is used to set the correction mode (ED mode). The setting end key “ST” is used to confirm the data correction content. The number selection key "No" is used especially for calculation modes 3 and 4
In, it is used when checking the input data.
The insert key "Ins" is also used for setup to select the additional insert mode of data.

The data delete key "Del" is used to delete one input numerical data, such as the numerical data "135", and the clear key "C" is input one numerical data, for example. It is used to delete one character such as one number "3" in the numerical data "135". The memory clear key "MC" is used to clear the stored contents of one memory variable or all memory variables,
The all clear key "AC" is used to clear all the stored contents relating to the input data. Further, the total sum addition key “GT” is a key for inputting the second or third end code, and the equal sign key “=” forming the first or second end code key is pressed once or more. When the key is pressed after being pressed, the cumulative value of the results calculated corresponding to the pressing of each equal sign key is displayed at a predetermined display location.

The key input unit 14 also includes a space key (bar) "SPACE", a cursor movement key ">",
Although "<" and scroll keys "↑" and "↓" for each data are provided, the functions of these and other specific keys will be described together with the operation contents in each mode.

FIG. 2 is a block diagram showing a specific configuration of the calculator shown in FIG. The calculator of this embodiment includes a CPU 20, RO
It basically comprises an M22, a RAM 24, an address and data bus 26, an LCD 28 constituting a display unit, and a keyboard 30 constituting a symbol input unit. Also, LCD2
8 and the bus 26, and the PIO device 32 and the driver 34 for connecting the keyboard 30 and the bus 26 are also included. Power source power can be supplied from either the solar cell 36 or the dry cell 38. Here, the main difference from the conventional calculator is that the calculator of the present embodiment has a built-in program for executing four calculation modes in the ROM, and each variable and the numerical value of each individual calculation result. In order to store the data, a RAM having a relatively large capacity is built in, and the number of display items on the display unit is relatively large. However, due to these differences, the calculator of this embodiment does not become significantly larger than the conventional one.

In use, when the power switch is turned on, first the calculation mode AP1 is automatically set. Here, the operator selects a desired calculation mode by pressing the “AP” key. Each time the operator presses the “AP” key, the calculation modes AP1, AP2, AP3 and AP4 are sequentially and repeatedly set, and the setting result is displayed on the display unit 16. However, in the calculation modes AP3 and AP4, when the total sum addition key "GT" is pressed on the data input screen in the execution mode, the total sum amount display screen appears, and when the "AP" key is pressed thereafter, Return to the data entry screen again. In this data entry screen, click "A
By pressing the "P" key again, the calculation mode AP4
Or, move to AP1.

In the calculation mode AP1, a normal operation as in a conventional calculator is performed. When AP1 is selected, the execution mode (EX mode) is automatically set, and the cursor moves to the left end of the screen. This calculation mode AP1
The display categories of the display unit 16 in are shown below.

[0025]

[Table 1]

As shown above, the upper part of the display is a calculation formula input area in which the input calculation formula is displayed as it is, and up to 34 digits can be displayed. Up to 12 digits can be used in the calculation formula. Further, the lower part of the display is a display part for displaying which of the EX / ED modes is on the left side, and the mode at that time is displayed as, for example, “EX”. The right side of the lower part is a display part for displaying the calculation result according to the input data up to the present time, and is updated each time data is individually input. Parentheses cannot be used in formulas.

If the total width of the data input as the calculation formula exceeds the display width of 34 digits in the upper part of the display unit, the display data is shifted to the left and the data portion currently being input is displayed. When numerical data and an operator are input, the operation result is updated each time the operator is input, and the operation result at that time is always displayed. When an equal sign (=) is input after the input of one calculation formula, it is detected that the input of the calculation formula is completed. The calculation is performed based on the input calculation formula, and the calculation result is displayed in the lower stage and stored in the memory.

After the input of the equal sign, if the displayed calculation result is further used for the calculation, the calculation is succeeded by subsequently inputting the operator and the numerical data. In this case, the previous calculation result is excluded from the target of the cumulative total, which will be described later. If you enter numerical data without pressing an operator, you will start entering a new calculation formula. Also in this case, the cursor on the display unit does not move to the left end, and the newly input calculation formula is displayed following the previous formula. As long as the calculation mode AP1 continues, regardless of whether the EX key is pressed or not, the calculation results obtained in response to the pressing of the equal sign key are automatically accumulated. You can refer to the cumulative total.

To check the input formula, press the cursor movement key "<" or ">" to move the cursor to a desired position, and keep pressing the cursor movement key to move the screen left or right. To scroll. The calculation formula can be checked regardless of the EX mode and the ED mode as long as the same AP1 mode continues.

When it is desired to input a new formula, the EX key is usually pressed first. Then, the calculation formulas obtained so far and the obtained calculated values are cleared from the display screen.
The cursor also returns to the upper left corner. At this time, the calculation formula and the calculated value so far are held in the memory so that they can be displayed again as long as the AP1 mode continues. These can be referred to by continuing to press the cursor movement keys "<" and ">. Variable data is also held.

Numerical data is stored in a memory variable (hereinafter also simply referred to as a variable) "M **" by key input "M ** ← numerical value". As the variable, M00 to M14 can be used, or simply “M” can be used as the variable. The contents of the variable “M **” are displayed by key input “M ** =”. Variables are commonly used in formulas. The deletion of the variable is performed by the key input "M ** MC". Simply pressing "MC" will delete all of the memory variables that have been entered so far.

The input data can be modified in either the EX mode or the ED mode. When deleting one character,
First, using the cursor movement keys "<" and ">",
Move the cursor to the position of the character in the formula and press the clear key "C". One character is deleted, the succeeding character is shifted to the left by one character, and the cursor stops at that position. Therefore, by continuously pressing the key "C", it is possible to delete a plurality of characters. When adding one or more characters, the cursor is moved to a desired position, and then the character to be added is keyed. As a result, the character input by the key is inserted immediately before the character where the cursor is.

When deleting one numerical data or variable from the calculation formula, the cursor is moved to the screen range where the numerical data or variable in the input calculation formula is displayed, and the data deletion key "Del" Press. For example, in order to delete the numerical value data “12345”, the cursor is moved to any position of these numerical values, and the key “Del” is pressed, whereby the numerical value “12345” is collectively deleted.

When the correction of the input data is completed, the correction is confirmed by depressing the equal sign key, and when the calculator is in the EX mode, the calculation is performed according to the calculation formula input by then, The calculation result is displayed. AP1
Fraction calculation is also possible in mode. Fractional display "/" and mixed fraction "&" can also be displayed. In this case, the number of displayed digits of the numerical value is reduced by about 8 minutes, for example.

In the AP1 mode, "G" is set after all calculations are completed or one calculation formula is completed.
When the "T" key is pressed, the total sum data obtained by summing the calculation results of each calculation formula is obtained. In this case, pressing the "GT" key switches to the following display.

[Table 2]

The calculation mode AP2 is used for addition / subtraction calculation of multiple data. In this AP2 mode, it can be considered that "addition" is stored in the calculation formula storage means. The display categories of the display section in the AP2 mode are shown below.

[Table 3]

When the calculation mode AP2 is selected, the EX mode is automatically set, and the cursor moves to the left end of the numerical value input area at the bottom of the screen. Enter the first number and click SP
Press the "ACE" key, then enter the second numerical value, and then press the "SPACE" key. As a result, the added value of the first numerical value and the second numerical value is displayed in the cumulative value display field. The last entered numerical value is displayed in the input numerical value display field. Then, repeat the input of numerical values and the pressing of the "SPACE" key. In the case of subtraction, add a negative sign to the numerical value.
While data is being input, the accumulated value at that point is displayed in the accumulated value display portion. The number in the "No" display field in the upper part of the screen is the number of input data that is incremented each time the "SPACE" key is pressed.

When the data input is completed, the equal sign forming the first end code is input. You can continue the previous calculation even after entering the equal sign, in this case "+"
After pressing the key, enter the numerical value and press the "SPACE" key to inherit the previous calculation. If you enter a value without pressing the "+" key, a new calculation will start.

Normally, when a new calculation is started, the "EX" key is pressed prior to this. As a result, all the displayed numerical values and accumulated values are cleared. In addition,
These can be redisplayed if desired as long as the AP2 mode continues. In AP2 mode, variables cannot be used, and even if the "GT" key is used, it does not work. When it is desired to inspect and correct the input numerical value, the scroll key "↑" or "↓" is pressed in the ED mode, and the input numerical value is individually displayed by scrolling up and down.

The operations for deleting and adding one character and deleting one numerical data for the input data are the same as the operations in the AP1 mode. In adding the numerical data, first, the input numerical value that should be the next numerical value of the numerical value to be added is displayed, and the insert key “Ins” is pressed. Next, enter the value you want to add and click “SPAC
Press the "E" key. To insert multiple numeric data, repeat numeric input, pressing the "SPACE" key, and numeric input. When the equal sign key is pressed after correction such as deletion and addition, the correction is confirmed.

Calculation mode AP3 is a mode for calculating multiple data in accordance with a desired calculation formula. First, a desired calculation formula including one or more variables is input and stored in the calculation formula storage means. Then, by inputting a large number of sets of data to be given to this variable, the calculation for a large number of data calculated by the same calculation formula is easily performed. The screen display categories when inputting each data in the AP3 mode are shown below.

[0042]

[Table 4]

The calculation formula is input in the ED mode prior to the above data input. When the input of the calculation formula is completed, the setting end key "ST" is pressed to shift to the EX mode. For example, the calculation formula including variables is (X1 + Y)
In the case of × Z + X2, the cursor is automatically moved to the position of the first variable X1 at the same time when the mode is changed to the EX mode. Input the data to be given to the variable X1 at this cursor position and press the "SPACE" key. At this time, since the cursor automatically moves to the next variable, the data for the next variable Y can be input. Thus, the data for each variable is sequentially entered with the cursor at the position of the variable.

The input data is displayed in the lower input data display column. When a set of variable data is input and the equal sign key “=” is pressed, the calculation is immediately performed and the calculation result is displayed. Subsequently, since the cursor returns to the position of the first variable X1, the next set of variable data is similarly input. If you press the "GT" key as necessary,
A cumulative value at that time of a plurality of calculation results for each data set performed according to the calculation formula is displayed.

In the AP3 mode, memory variables can be inserted in the calculation formula. The memory variable is displayed as "M **". For example, “M11 → 3_” is used to input data to the memory variable.
14_5 ”and the array“ 3_1 ”is stored in the variable M11.
4_15 ”can be given. If this memory variable is inserted into the calculation formula as, for example, (X1 + Y1) + M11, an array having elements corresponding to the respective elements of the variable array is obtained as the calculation result of the calculation formula. The variables that can be used in the calculation formula are X, Y, Z, in addition to this memory variable.
There are X *, Y * and Z * (* is an arbitrary number).

The correction of the calculation formula is performed from the time of inputting the calculation formula.
It is possible until the data input is started, and once the data input is started, the calculation formula cannot be modified thereafter.
In this case, if correction becomes necessary, the calculation formula is input again from the beginning. Input data is corrected in the ED mode by pressing the "ED" key. Character deletion, insertion, etc. are performed in the same manner as other modes.

The following is an example of an income statement calculation table.
This will be completed by filling each blank in this income statement using AP3 mode. By adopting such a method, the number of key inputs can be reduced compared to the conventional calculator.
For example, it can be reduced to about 30% or less.

[Table 5]

First, the calculation formula is input. Press the ED key to put the calculator in edit mode and enter the formula. Enter multiple formulas as formulas and connect these formulas with a colon. M1 ← X-Y: M2 ← M1 ÷ X × 100: M3 ← M1-
Z1-Z2: When the calculation formula overflows the screen, the screen scrolls to the left. Then, press the EX key to enter the execution mode. The following screen display categories are obtained.

[0049]

[Table 6]

That is, the calculation formula is displayed in the upper part of the screen, and the data input area and the calculation result display part are obtained in the lower part.
At this time, the cursor is located at the X position of the first calculation formula (X-Y), and data input is prompted. Here, when January data 1500 of the variable X is input in the data input area and then a space is input, the cursor moves to Y. When the data 1200 of the variable Y is input and the space key is pressed, the cursor moves to the position of the colon (:) after the first calculation formula. When the space key is further pressed, the first calculation formula (XY) is immediately calculated, and the calculation result 300 is obtained in the calculation result display section. Since there is no variable in the second expression, the cursor moves to the position of the following :. As soon as you enter a space, the calculation result of the second formula is 2
0.0 is obtained, and the cursor moves to the variable Z1 in the third equation.

Similarly, the data of the variable Z1 in the third equation and Z
By inputting the data 80 and 70 of No. 2 and pressing the space key, the cursor moves to :. When the space key is pressed further, 150 which is the calculation result of the third expression is obtained. The respective results obtained are M1, M2, and M3 in the table.
Will be posted to the relevant section of. Since there is no calculation formula after that, the cursor moves to the position of the variable X in the first formula again. Similarly, when the data for February is input, M1, M2 and M3 for February are obtained and transcribed. Hereinafter, the calculation from March to December is similarly performed.

When the calculation is completed by December and the cursor is at the position of the variable X in the first expression, if the GT key is pressed, the sum of the data for X input from January to December is added. ΣX is obtained. This is transferred to the total column (annual total) of the sales column X. At this time, the cursor moves to the variable Y. Similarly,
If the GT key is pressed while the cursor is at the position of the variables Y,:,:, variables Z1, Z2,:, the variable Y, the operation result XY, the operation result M1 ÷ X × 100, ... Since the total number of each is obtained, it is posted to each total column. The total value of each variable and calculation result by pressing the GT key is the total for each column of the matrix, and the necessary matrix calculation is performed by only entering the formula once and entering the data once. Be done.

FIG. 3 is a flow chart showing the processing of the calculator in the AP3 mode. When the calculation formula input by selecting the mode ED is completed and the setting end key "ST" is pressed (step S1), the calculator shifts to the EX mode (step S2), and first, the structure of the calculation formula is checked. (Step S3). If an error is found in the calculation formula (step S4), the correction is prompted by blinking the cursor, etc. If there is no error, the calculation formula is stored, the number of variables in the formula is checked, and the state shifts to the input waiting state. Yes (step S5). The data for each variable is entered, followed by the space key (for multiple formulas) or the equals key “=” after entering the data.
When (In the case of independent calculation formula) is pressed (step S
6) The number of input data is checked (step S7). If the number of data is appropriate for the number of variables,
The data is directly substituted for the variable and the calculation is performed according to the calculation formula (step S8). If not, an error message is displayed and the data correction is prompted.

In step S8, when the number of data is appropriate and the calculation is performed, the calculation result is displayed and the calculation result is added to the cumulative value. When there are a plurality of calculation formulas, data input for other calculation formulas is prompted, the calculation is similarly performed by the input, and finally the equal sign key is pressed. If the next input is pressing the "GT" key (step S9), the calculated cumulative data is displayed, and if the next input is a numerical input, it is assumed that there is a second data input, It returns to step S6. Each data entered as the value of the variable and its operation result are saved in the memory as they are, and can be inspected by scrolling with the scroll keys "↑" and "↓", and the cursor movement keys "<" and ">" etc. It is possible to correct the data by using.

Calculation mode AP4 is performed as follows. In the AP4 mode, it can be said that the calculation formula stored in advance in the calculation formula storage means is multiplication. here,
The "SPACE" key, equal sign key, and GT key are the first and
Construct second and third end code keys. The screen display categories in AP4 mode are shown below.

[0056]

[Table 7]

On the AP4 mode input screen, the cursor is located in either the unit price input area or the quantity input area, and the "SPACE" key is pressed to move to the other input area.
When the AP4 mode is selected, the EX mode is automatically set and the cursor moves to the unit price input area in the upper part of the screen. The number of slips, slip number, and line number are each displayed as 1. The unit price of the first slip on the first line, the "SPACE" key pressed, the quantity input on the first line, and the "SPACE" key pressed. Input operations are performed in order. As a result, the input unit price and quantity are displayed in the respective input areas, and the calculation result of unit price × quantity is displayed in the line amount column. The same amount is also displayed in the line amount cumulative value column. When the next unit price is input, the number in the line number display field is incremented to 2. After that, the same input is performed sequentially, such as pressing the "SPACE" key, inputting the quantity, and pressing the "SPACE" key. As a result, the line amount is displayed based on each calculation result, and the line amount cumulative value is updated.

When the input for one slip is completed,
Press the equal sign key "=". As a result, the display fields for the number of slips and the slip number are incremented. At this time,
The line number also returns to 1. When the same operation as described above is performed on many slips, the calculation result is displayed correspondingly. Variables cannot be used in AP4 mode.

When the input of the last slip is completed,
After pressing the "=" key, press the "GT" key.
By this operation, the display format of the display changes to a screen displaying the total number of slips, the total sum of each quantity column, and the total sum of the total sum of each slip, and these numerical values are displayed on the screen. Is displayed in. Pressing the "GT" key again returns to the previous input screen. If you want to continue the previous calculation, enter the next line again. This allows
The previous voucher calculation is inherited.

A new calculation is started by pressing the "EX" key. As a result, the data input so far disappears from the memory and the screen and cannot be displayed again. If the "EX" key is pressed without pressing the "GT" key, the input numerical values and calculated values up to this point disappear from the memory and the screen. Therefore, even if the "GT" key is pressed after that, the total amount of money cannot be obtained. Similarly, if the "AP" key is pressed first, the total amount cannot be obtained.

When it is desired to check the input numerical value, the input numerical value is scrolled up and down by operating the scroll keys "↑" and "↓". If you want to correct the input value, first press the "ED" key and press E.
Set to D mode. In this case, the cursor moves to the upper unit price input area, and the screen displays the state after the input of the first line of the first slip. Here, scroll key "↑"
Or, use “↓” to scroll the lines up and down to display the line you want to display and make the necessary corrections.

When correcting the input numerical value, it is possible to directly specify the slip number. When the number selection key "No" is pressed after inputting the data or in any line screen, the cursor moves to the lower slip number column. When the slip number is specified by key input at this cursor position,
The input data of the slip number can be referenced. In this case, the "SPACE" key is pressed after inputting the specified slip number. As a result, the data of the first line of the designated slip number is displayed. You can scroll the lines to get the desired line.

When the desired line is displayed, "SPACE"
Press the key, "<" or ">" key to move the cursor to the desired position. 1 by pressing the clear key "C" or the delete key "Del" at the position where the cursor is
If you delete a letter or a number, or add a number,
Place the cursor at that position and insert a number. To add line data, scroll with the "↑" or "↓" key to display the input line screen that is the next line after the insertion position, and press the "Ins" key to add a new line. Get the line input screen. When additional data input is completed,
Press the "SPACE" key. When the addition or modification of data is completed, press the "=" key to confirm the modification.
At this point, the corrected input data is reflected in the total amount.

When the calculator of the above embodiment is used, the optimum input mode for obtaining the desired calculation result is obtained by selecting the optimum mode for the data to be input. Speed is improved.

The configuration of the above embodiment is merely an example, and the desk-top electronic calculator of the present invention can be modified and changed in various ways from the configuration of the above embodiment.

[0066]

As described above, according to the desk-top electronic calculator of the present invention, the data input for the calculation is performed easily and quickly, so that the calculation speed in the calculation repeated according to the predetermined calculation formula is remarkable. The effect is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing the appearance of a calculator according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of the calculator of the embodiment shown in FIG.

FIG. 3 is a flowchart of AP3 mode in the calculator of the embodiment of FIG.

[Explanation of symbols]

 10 calculator 12 frame 14 symbol input unit 16 display unit 18 solar cell 20 CPU 22 ROM 24 RAM 26 bus 28 LCD display unit 30 key input unit 32 PIO device 34 driver

Claims (9)

[Claims] 1. A symbol input key capable of inputting at least numerical data, a calculation formula storage unit for storing a calculation formula including one or more variables, and a variable included in the calculation formula stored in the calculation formula storage unit. When the numerical data corresponding to is input, the data storage means for storing the numerical data in correspondence with the variable, and the numerical data stored in the data storage means are stored in the calculation formula storage means. A desktop electronic calculator comprising: a computing unit that substitutes each of the variables of the formula, executes a computation based on the computation formula, and outputs a computation result. 2. The desk-top electronic calculator according to claim 1, further comprising a second arithmetic unit that accumulates a plurality of arithmetic results respectively output from the arithmetic unit based on the calculation formula and the numerical data. 3. The symbol input key can further input a calculation formula, and the calculation formula stored in the calculation formula storage means is
The desk calculator according to claim 1 or 2, which is input from the symbol input key. 4. The desk calculator according to claim 3, further comprising a display device for displaying a display for prompting the input of numerical data corresponding to the variable. 5. The desk calculator according to claim 1, wherein the calculation formula storage means stores a plurality of calculation formulas. 6. A numeric keypad for inputting a numerical value, an operation code key for inputting an operator, a first end code key for inputting a first end code, and a second end code for inputting. In response to the symbol input key including the second end code key of, and the first end code input after the formula,
A first operation means for performing an operation according to the calculation formula corresponding to the first end code and outputting the result as a first operation value; a counter for counting the number of inputs of the first end code; In response to the second end code input after the input of the first end code, the cumulative value of each first operation value calculated in response to each of the first end codes is calculated as a second value. A desktop electronic calculator comprising: a second arithmetic means for outputting as an arithmetic value. 7. The symbol input key further includes a third end code key for inputting a third end code, and after the input of two or more second end codes, the third end code key is input. The desk-top electronic calculator according to claim 6, wherein when the end code key is input, the cumulative value of the second operation values calculated in response to each of the second end codes is output as the third operation value. 8. A storage unit for storing the calculation formula and a display unit for displaying the calculation formula stored in the storage unit at least until the third end code is input. The desk-top electronic calculator according to claim 7, which enables modification of the calculated formula. 9. At least until the second end code is input, a storage unit that stores the input calculation formula and a display unit that displays the calculation formula stored in the storage unit are provided. The desk-top electronic calculator according to claim 6 or 7, which enables modification of the stored calculation formula.