JP2002063144A - Electronic desk computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic desk computer, capable of easily knowing the present calculating position from display counts, even in the case of the calculating position being lost in the middle of calculation. SOLUTION: This electronic desk computer is provided with the function for inputting a formula and for executing the arithmetic operation of the inputted formula, for adding or subtracting the arithmetic result to a memory, for calling a value stored in the memory, and for using the called out value as a value in the formula in a format based on a register. At adding and subtracting of the arithmetic result of the formula to the memory, the value of a counter for the arithmetic number of times is added simultaneously with a counter for the memory; and at executing of the arithmetic operation using the value of the memory in the formula in the format based on the register, the value of the counter of the memory is added simultaneously with the counter for the arithmetic number of times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic desk calculator having a counter function, a check function, or a status display function.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open Nos. 50-11496 and 57-136270 show computers having a counter function. A counter provided in a conventional computer counts the number of digits by counting the number of times an operator key is pressed. Also,
The value stored in the counter was also cleared by the key to clear the operation result.

[0003]

Problems to be Solved by the Invention
The counters disclosed in Japanese Unexamined Patent Application Publication No. 6 and JP-A-57-136270 are based on the premise that counting is basically performed by a computer that performs an operation by an addition formula. For counting in a computer that performs calculations according to the formula and counting operation for special calculation keys,
It is not shown in the above publication.

In the prior art, a counting operation is performed when an operator key is input, so that the value of the counter is calculated not to what number in the numerical value but to what item. It is hard. For this reason, when the user loses track of the currently input item, the method of searching for the item differs depending on whether or not the input is in progress. If you are in the middle of the number,
There is a problem in that an item obtained by adding 1 to the counter value must be searched, and immediately after the operator input, an item having the counter value must be searched.

In the prior art, when the operation result is cleared by the clear key, the value of the counter is also cleared. Also, after performing the calculation with the calculator as in the formula,
When another operation is performed, there is a problem that the counter value is not cleared regardless of whether the clear key is operated.

In the prior art, the number of times the operator key is pressed is counted, so if the operator presses the operator key and corrects it according to a mathematical formula, the number of actual operations and the number of times the operator key is pressed are calculated. However, there is a problem that the counter value becomes incorrect.

In the prior art, the counting operation is performed in accordance with the actual number of times of input of the operator key, even when the input of the calculation content is omitted as in the case of constant calculation. There was a problem that did not fit.

[0008] When counting the number of times of execution of a key having a plurality of results such as a tax calculation key and alternately exchanging the result each time the key is pressed, if this key is pressed many times, the number of times the key is pressed However, there is a problem that the number of calculations does not match the value of the counter.

In the prior art, the counter for the memory counts the number of times the [M +] and [M-] keys are pressed. However, after inputting the expression, execution of the expression with the [M +] key and the result are executed. Even if the addition to the memory is performed at the same time, the counter for the memory only increases by one, and the actual number of calculations does not match the value of the counter.

In the prior art, the count value is increased by one even if it is a call value from a memory or the like.
When a complicated expression is calculated using a memory, only one call value is counted even if a plurality of additions and subtractions are performed in the memory, and there is a problem that the actual number of calculations does not match the value of the counter.

JP-A-57-150056 and JP-A-02-15359 disclose a computer in which a user compares a plurality of display values. Therefore, there is a problem that the user has to compare the calculation result with the comparison value.

In the prior art, there is no status display indicating whether the number is in the middle or after the operator input. Therefore, when searching for the counter value as a clue by losing track of which item is being input, the maximum input There was a problem that you did not know what you did.

The present invention has been made in view of the above problems. The purpose is that even if the calculation position is lost during the calculation, the current calculation position can be easily known from the display count, and the comparison target and the calculation result are automatically compared. An object of the present invention is to provide an electronic desk calculator for displaying whether or not an operator has been input.

[0014]

SUMMARY OF THE INVENTION An electronic desk calculator according to the present invention is capable of inputting an expression, performing an operation on the input expression, adding / subtracting the operation result to / from a memory, and recalling a value stored in the memory. An electronic desk calculator having a function of using the called value as a value in an expression in a form similar to a numeral, wherein when adding / subtracting the result of the expression that performed the operation to / from the memory, When the value of the counter is added simultaneously with the counter for the memory, and the value of the memory is used in the expression in a form similar to the set number, the value of the counter of the memory is added simultaneously with the counter for the number of calculations. Do
Thereby, the above object can be achieved.

[0015]

(Embodiment 1) FIG. 1 shows an example of the appearance of an electronic desk calculator according to the present invention. The electronic desk calculator according to the first embodiment includes a display 2 and a keyboard 3
, A controller 11, a ROM 12, and a RAM 13.

The display 2 has a numeral, a calculation result,
The counter value is displayed. The display 2 may be a liquid crystal display device.

The keyboard 3 is provided with numerical keys for performing numerical input, a decimal point key, an operator key, and calculation result keys such as [=].

FIG. 2 shows an example of the configuration of the electronic desk calculator shown in FIG.
Shown in

When a key on the keyboard 3 is pressed, a signal corresponding to the key is output to the controller 11.

The controller 11 receives a signal from the keyboard 3 and determines which key in the keyboard 3 has been pressed. The controller 11 performs a calculation process including four arithmetic operations, a counting process of the display counter 13c, a display process of a calculation result, and the like.

The ROM 12 stores a program for performing the above-described processing, a program for performing computer graphics, and the like.

The RAM 13 includes an operator register and a display counter 13c.

An example of the operation of the electronic desk calculator according to the present invention will be described with reference to FIG. FIG. 3 shows the transition of the display screen of the display 2 and the relationship between the data input by the keyboard 3.

The display screen S 1 is an initial screen of the display 2. In the present specification, a screen in which 00 is displayed in the counter section and 0 is displayed in the numerical section is referred to as an initial screen. When the power switch is turned on or when the clear key [C] is pressed, the display 2 is set to the initial screen.

The display screen S2 shows a screen when the leading part 1 of the numeral 123 is input. When the leading part 1 of the numerical value is input, 01 is displayed in the counter part and 1 is displayed in the numerical part. The display screen S3 shows a screen when the input of the number 123 is completed. 12 in the numeric part
Although 3 is displayed, the value displayed on the counter section does not change.

The display screen S4 shows a screen when [+] is input as an operator. This allows
The values displayed in the numerical value part and the counter part do not change.
The display screen S5 shows a screen when the input of the numeral 456 as the operand is completed. As a result, 02 is displayed on the counter portion and 456 is displayed on the numerical value portion.

The display screen S6 shows a screen when the input of the calculation result key [=] for obtaining the calculation result is completed. 579 indicating the calculation result is displayed in the numerical value portion, and the value displayed in the counter portion does not change.

The display screen S7 is a screen displayed when the input of the leading part 9 of the numeral 987 is completed following the above-described calculation. As a result, 01 is displayed on the counter section and 9 is displayed on the numerical value section. The display screen S8 shows a screen when the numeral 987 is input and the input of [-] is completed.

On the display screen S9, the number 654 is inputted,
The screen when input of [=] is completed is shown. 02 is displayed in the counter section, and 333 which is the calculation result is displayed in the numerical section. Although 333 is displayed in the numerical value part, the value displayed in the counter part does not change.

The display screen S10 shows a screen when [+] is pressed while 333 is displayed in the numerical value part. As a result, the values displayed on the numerical value part and the counter part do not change.

The display screen S11 shows a screen when the numeral 321 is input and the input of [=] is completed.
03 is displayed in the counter section, and 654 as a calculation result is displayed in the numerical section.

The operation of the electronic desk calculator of the present invention when the display 2 of the electronic desk calculator of the present invention displays the display screen S11 from the display screen S1 will be described with reference to FIG. FIG. 4 shows an example of a state transition of the electronic desk calculator of the present invention.

When the user turns on the power switch or presses clear [C], the electronic desk calculator of the present invention is set to the initial state.

When a numeric key is pressed, a signal corresponding to the numeric key is generated. The controller 11 receives the signal generated by the numeric key. In response to the generated signal, initial state 20 passes through path 40 and sets state 2
Transitions to 1. As a result, the controller 11 increases the value held in the display counter 13c by one. Specifically, the controller 11 calls the value of the display counter 13c, increases the value of the display counter 13c by one, and stores the increased value in the display counter 13c. Further, in response to such a transition, the controller 11 outputs a signal generated by the numerical keys to the display 2. The numeric portion of the display 2 displays a number corresponding to the numeric key based on a signal generated by the numeric key. The value stored in the display counter 13c is displayed on the counter section of the display device 2.

When a numeric key is pressed, the controller 11 receives a signal generated by the numeric key, as described above. In response to the generated signal, the numeral state 21 is:
The state transits to the number state 21 through the path 41. As a result, the controller 11 outputs a signal generated by the numerical keys to the display 2. In the numerical portion of the display 2, a number corresponding to the numerical key is further displayed based on the signal. Since the display counter 13c maintains the value held by itself, the value displayed on the counter unit of the display 2 does not change.

When a binary operator key is pressed, a signal corresponding to the binary operator key is generated. The controller 11
Receive the signal generated by the binary operator. In response to the generated signal, the numeral state 21 transits to the binary operation state 22 via the path 42. The value displayed on the display 2 in the binary operation state 22 is the numeral state 21
Is the same as the value displayed on the display 2. In addition,
The display counter 13c maintains a value held by itself.

When the numeric key is pressed, the controller 11 receives the signal generated by the numeric key, as described above. In response to the generated signal, the binary operation state 22
Transits to the number state 21 through the path 43. As a result, the controller 11 increases the value held in the display counter 13c by one, and outputs a signal generated by the numerical keys to the display 2. The display 2 displays a number corresponding to the numeric key on a numeric portion based on a signal generated by the numeric key. The value stored in the display counter 13c is displayed on the counter section of the display device 2.

When the calculation result key [=] is pressed, a signal corresponding to the calculation result key [=] is generated. The controller 11 receives a signal generated by the calculation result key [=]. In response to the generated signal, the number state 2
1 changes to the operation end state 23 through the path 44. As a result, the numeric value input before the binary operator key is pressed and the numeric value after the binary operator key is pressed are calculated based on the relation of the binary operator. Is done. The calculated result is displayed on the numerical value section of the display device 2. The display counter 13c maintains the value held by itself. The value stored in the display counter 13c, that is, 1 is displayed on the counter section of the display device 2.

When the numeric key is pressed, the controller 11 receives the signal generated by the numeric key as described above. In response to the generated signal, the operation end state 23
Transits to the number state 21 through the path 45. As a result, the controller 11 clears the display counter 13c and further sets the value held in the display counter 13c to 1
And outputs the signal generated by the numerical keys to the display 2. The display 2 displays a number corresponding to the numeric key on a numeric portion based on a signal generated by the numeric key. The value stored in the display counter 13c is displayed on the counter section of the display device 2.

When a binary operator key is pressed, a signal corresponding to the binary operator key is generated. The controller 11
Receive the signal generated by the binary operator. In response to the generated signal, the operation end state 23 indicates that the path 4
The state transits to the binomial operation state 22 through 6. As a result, the display counter 13c maintains the value held by itself. In the binary operation state 22, the display 2
Are displayed on the display 2 in the operation end state 23.
Is the same as the value displayed in. After this, binary operation state 2
The transition of 2 to another state is the same as the above-described state transition, and thus the description is omitted.

Next, an example of the transition of the display screen of the electronic desk calculator of the present invention when the binary operator key is pressed in an arbitrary binary arithmetic state 22 will be described with reference to FIG. FIG. 5 shows a state transition of the display screen of the electronic desk calculator according to the present invention.

The display screen S21 is an initial screen of the display device 2. The display screen S22 shows a screen when the input of the number 123 is completed. 123 is displayed in the numerical value part. 01 is displayed on the counter section.

The display screen S23 displays [+] as an operator.
Shows a screen in the case where is input. As a result, the values displayed on the numerical value part and the counter part do not change. The display screen S24 shows a screen when [-] is input as an operator. As a result, the values displayed on the numerical value part and the counter part do not change. The electronic desk calculator determines that [-] is input as an operator instead of [+].

The display screen S25 shows a screen when the input of the numeral 10 as the operand is completed. As a result, 02 is displayed on the counter portion and 10 is displayed on the numerical value portion.

The display screen S26 shows the screen when the input of the calculation result key [=] for obtaining the calculation result is completed. 113 indicating the calculation result is displayed in the numerical value part, and the value displayed in the counter part does not change.

FIG. 6 shows the state transition of the electronic desk calculator of the present invention including the case where the display screen transitions from the display screen S21 to the display screen S26. The states and paths shown in FIG. 6 that are the same as the states and paths shown in FIG. 4 are assigned the same numbers, and descriptions thereof are omitted.

The case where the state of the controller 11 of the present invention is the binary operation state 22 and the binary operator key is pressed will be described below.

For example, as described above, when the binary operator key is pressed in the numeric state or the operation end state, the state of the controller 11 of the present invention changes to the binary operation state.

Further, when the binary operator key is pressed in the binary operation state, the state of the controller 11 passes through the path 47 and returns to the binary state in response to the signal generated by the binary operator key. The state transits to the operation state 22.

The value displayed on the display 2 in the binary operation state 22 is the same as the value displayed on the display 2 in the binary operation state 22 before the transition. Binary operator data corresponding to a binary operator key pressed later is input to the controller 11. That is, from the binary operation state 22 to the numeral state 2
Immediately before the transition to 1, binary operator data corresponding to the pressed binary operator key is input to the controller 11.

The display counter 13c maintains the value held by itself.

Next, in an arbitrary number state 21, the display screen S
Reference numeral 34 denotes an example of transition of the display screen of the electronic desk calculator according to the present invention when [C · CE] is pressed, with reference to FIG. FIG. 7 shows the state transition of the display screen of the electronic desk calculator of the present invention.

The display screen S31 is an initial screen of the display device 2. The display screen S22 shows a screen when the input of the numeral 123 as the number of operations is completed. 1 in the numeric part
23 is displayed. 01 is displayed on the counter section.

The display screen S33 displays [+] as an operator.
Shows a screen in the case where is input. As a result, the values displayed on the numerical value part and the counter part do not change. The display screen S34 shows a screen when the input of the numeral 456 as the operand is completed. 4 in the numeric part
56 is displayed. 02 is displayed on the counter section.

The display screen S35 shows the clear key [CC].
E] shows the screen when the input is completed. As a result, the previously entered numeral 456 and operator [+] are deleted from the controller 11. The controller 11 includes
Only the numeral 123 is stored. Therefore, 123 is displayed in the numerical value portion, and 01 is displayed in the counter portion.

The display screen S36 displays [×] as an operator.
Shows a screen in the case where is input. As a result, the values displayed on the numerical value part and the counter part do not change.

The display screen S37 shows a screen when the input of the numeral 4 as a new operand is completed. 4 is displayed in the numerical part. 2 is displayed on the counter section.

The display screen S38 shows the screen when the input of the calculation result key [=] for obtaining the calculation result is completed. 492 indicating the calculation result is displayed in the numerical value portion, and the value displayed in the counter portion does not change.

FIG. 8 shows the state transition of the electronic desk calculator of the present invention including the case where the display screen transitions from the display screen S31 to the display screen S38. The states and paths shown in FIG. 8 that are the same as the states and paths shown in FIG. 4 are given the same numbers, and descriptions thereof are omitted.

The state of the controller 11 of the present invention is a numeral state 21
The case where the clear key [C · CE] is pressed will be described below.

When the clear key [C.CE] is pressed, a signal corresponding to the clear key [C.CE] is generated. The controller 11 receives the signal generated by the clear key [C · CE]. In response to the generated signal, the numeral state 21 goes through the path 47 and the numerical value clear state 2
Transition to 4. As a result, the numerical value input immediately before the transition to the numerical value clear state 24 or the numerical value and the operator input immediately before the transition to the numerical value clear state 24 are cleared. Since the input numerical value is cleared, the value stored in the display counter 13c is a value obtained by subtracting one from the value stored in the display counter 13c in the numerical value state 21, and the value is displayed. Is displayed on the counter section of the container 2.

When the numeric key is pressed, the numeric clear state 24 transits to the numeric state 21 via the path 48 in response to a signal generated by the numeric key. The subsequent transition is the same as the transition in FIG.

FIG. 21 is a flowchart showing an example of the operation of the counter when the numeric keys [0] to [9] and [•] are pressed.

At step N1, the controller 11 determines whether or not the numeric key has been pressed immediately before the numeric key is pressed. If the numeric key is pressed immediately before the numerical key is pressed, the process is terminated. In this case, 1 has already been added to the display counter 13c.

In step N2, the controller 11 determines whether or not the numeric key [RM] has been pressed immediately before the numeric key is pressed. Immediately before the numeric key is pressed,
When the numeric key [RM] is pressed, the controller 11
Stores the value stored in the internal counter 13d in the display counter 13c. If not, the process proceeds to step N3. If the electronic desk calculator of the present invention does not include the semi-numerical key [RM], the process unconditionally proceeds to step N3.

In step N3, the controller 11 determines whether or not a unary operator key such as a square root is pressed immediately before the numeric key is pressed. If a unary operator key such as a square root is pressed immediately before the numeric key is pressed,
Proceeding to step N4, the controller 11 sets the internal counter 13
The value stored in d is stored in the display counter 13c. Otherwise, the process proceeds to Step N5. In addition,
If the electronic desk calculator of the present invention does not have a unary operator key such as a square root, the process unconditionally proceeds to step N5.

In step N5, the controller 11 determines whether a binary operator such as an arithmetic operator has been pressed immediately before the numeric key is pressed. Immediately before the numeric key is pressed, if a binary operator such as an arithmetic operator is pressed, the process proceeds to step N7; otherwise, the process proceeds to step N7.
Proceed to 6.

At step N6, the controller 11 stores 0 in the display counter 13c.

At step N7, the controller 11 increases the value of the display counter 13c by one.

FIG. 23 shows binary operator keys [+], [×]
9 is a flowchart illustrating an example of the operation of the counter when the user inputs the information.

At step N21, the controller 11 determines whether or not the binary operator key has been pressed immediately before the binary operator key is pressed. If the binary operator key has been pressed immediately before the binary operator key is pressed, this process ends.

The case where the binary operator key is pressed immediately before the binary operator key is pressed means, for example, that the key [+] is pressed where the key [-] must be pressed. For example. In this case, the counter processing has already been performed, so the counter processing ends. If the binary operator key has not been pressed immediately before the binary operator key is pressed, the process proceeds to step N22.

In step N22, immediately before the binary operator key is pressed, the controller 11 determines whether or not the unary operator key is pressed. If the unary operator key is pressed immediately before the binary operator key is pressed, step N2
Proceed to 3. Otherwise, the process proceeds to step N4.

At step N23, the controller 11 increments the value of the display counter 13c by one, and proceeds to step N24.

At step N24, the controller 11 stores the value of the display counter 13c in the internal counter 13d.

If the operation has just been performed, step N
Before Step 21, a step N20 of clearing the display counter 13c and increasing the display counter 13c by one may be added.

FIG. 26 is a flowchart showing an example of the operation of the counter when the clear key [C · CE] is input. When the clear key [C · CE] is pressed, the input number is cleared before the clear key [C · CE] is pressed, and the state returns to the state immediately after the operator key is pressed.

At step N51, the controller 11 determines whether or not the operator has been pressed before the clear key [C · CE] is pressed. If the operator is pressed before the clear key [C · CE] is pressed, the process proceeds to step N52. If not, the process proceeds to step N53.

At step N53, the controller 11 determines whether or not the numeric key has been pressed before the clear key [C · CE] has been pressed. If the numeric key is pressed before the clear key [C · CE] is pressed, step N54
Proceed to. If not, the process proceeds to step N53.

At step N53, the controller 11 stores 0 in the display counter 13c.

At step N54, the controller 11 stores the value of the internal counter 13d in the display counter 13c.

In step N55, the controller 11 subsequently changes the operator key to correct the operator,
In order not to increase the display counter 13c by one, a flag or the like is set to the same state as immediately after the operator key is pressed.

(Embodiment 2) An electronic desk calculator 1 according to Embodiment 2 comprises a display 2, a keyboard 3, and a controller 1.
1, a ROM 12, and a RAM 13.

The display 2 displays the numbers and the calculation results and the value of the display counter 13c. The display 2 may be a liquid crystal display device.

The keyboard 3 is provided with numerical keys for performing numerical input, decimal point keys, operator keys, and calculation result keys such as [=]. When a certain key on the keyboard 3 is pressed, a signal corresponding to the certain key is output to the controller 11.

The controller 11 receives a signal from the keyboard 3 and determines which key in the keyboard 3 has been pressed. The controller 11 performs calculation processing including four arithmetic operations, counting processing of the display counter 13c and the internal counter 13d, and display processing of the result.

The ROM 12 stores a program for performing the above-described processing, a program for performing computer graphics, and the like.

The RAM 13 includes an X register 13a, a Y register 13b, a display counter 13c, an internal counter 13d, an operator register 13f, and other work areas required for operations.

The X register 13a stores the value of the numerical value and the value of the operation result and the like. The value stored in the X register 13a is displayed in the numerical value section of the display 2. The operator register 13f stores an operator input by an operator key (+,-, ×, ÷, etc.).

An example of the operation of the electronic desk calculator according to the second embodiment will be described with reference to FIG. FIG. 9 shows the relationship between the transition of the display screen of the display 2 according to the second embodiment, the transition of the value stored in each register, and the transition of the value stored in each counter.

[0091] The display screen S41 is an initial screen of the display device 2. In this case, an X register 13a, an operator register 13f, a Y register 13b, and a display counter 13c
And the values stored in the internal counter 13d are 0, respectively. Note that the value stored in the operator register 13f may be an arbitrary value.

[0092] The display screen S42 displays the first part 1 of the numeral 123.
Shows a screen in the case where is input. The first part of the number
Is input, 01 is displayed in the counter portion, and 1 is displayed in the numerical value portion. The X register 13a stores 1 and the display counter 13c stores 1. The operator register 13f, the Y register 13b, and the internal counter 13d maintain the previous value, that is, 0.

The display screen S43 shows a screen when the input of the numeral 123 is completed. Although 123 is displayed in the numerical value section, the value displayed in the counter section does not change.
123 is stored in the X register 13a. The display counter 13c maintains 1, and the operator register 13f and
The Y register 13b and the internal counter 13d have the previous value,
That is, 0 is maintained.

The display screen S44 displays [×] as an operator.
Shows a screen in the case where is input. In this case, Y
The value 123 stored in the X register 13a is stored in the register 13b, and the X register 13a maintains the value 123. Further, the values displayed on the numerical value part and the counter part do not change. The display counter 13c maintains 1. X is stored in the operator register 13f. Since the operator is input, 1 is stored in the internal counter 13d.

[0095] The display screen S45 shows a screen when the input of the numeral 4 as the operand is completed. In this case, 02 is displayed on the counter section and 4 is displayed on the numerical value section. In this case, 4 is stored in the X register 13a. 2 is stored in the display counter 13c. Y
The register 13b, the operator register 13f, and the internal counter 13d maintain the previous values.

The display screen S46 displays [×]
Shows a screen in the case where is input. In this case, a value 492 indicating the calculation result is displayed in the numerical value part. The value displayed on the counter does not change. A value 492 indicating the operation result is stored in the X register 13a, and 2 is stored in the internal counter 13d. The Y register 13b maintains the previous value 123, and the display counter 13c maintains the previous value 2. The operator register 13f maintains the previous value x.

The display screen S47 shows a screen when the input of the numeral 5 as the operand is completed. In this case, 03 is displayed on the counter section, and 5 is displayed on the numerical value section. The value 492 stored in the X register 13a is stored in the Y register 13b.
Is stored as 5. 3 is stored in the display counter 13c. Operator register 13f and internal counter 1
3d maintains the previous value.

The display screen S48 shows the screen when the input of the calculation result key [=] for obtaining the calculation result is completed. 2460 indicating the calculation result is displayed in the numerical value part, and the value displayed in the counter part does not change. In this case, the value 2460 indicating the operation result is stored in the X register 13a.
Is stored, and 3 is stored in the internal counter 13d. The Y register 13b maintains the previous value 492, and the display counter 13c maintains the previous value 3. Operator register 1
3f maintains the previous value x.

The display screen S49 is displayed following the above-described calculation.
The screen when the input of the numeral 10 as the operand is completed is shown. In this case, 01 is displayed on the counter portion and 10 is displayed on the numerical value portion. The X register 13a stores 10 and the display counter 13c stores 1. The Y register 13b maintains the previous value 492, the internal counter 13d maintains the previous value 3, and the operator register 13f maintains the previous value x.

The display screen S50 shows a screen when the input of the calculation result key [=] for obtaining the calculation result is completed. 4920 indicating the calculation result is displayed in the numerical value portion, and 03 is displayed in the counter portion. in this case,
A value 4920 indicating the operation result is stored in the X register 13a, and the internal counter 13d maintains the previous value of 3. The value stored in the internal counter 13d is stored in the display counter 13c. The Y register 13b maintains the previous value 492, and the operator register 13f maintains the previous value x.

The operation of the electronic desk calculator of the present invention including the case where the display 2 of the electronic desk calculator of the present invention displays the display screen S50 from the display screen S41 described above will be described with reference to FIG. FIG. 10 shows an example of the state transition of the electronic desk calculator of the present invention.

When the user turns on the power switch or presses clear [C], the electronic desk calculator of the present invention is set to the initial state. X register 13
a, an operator register 13f, a Y register 13b,
The values stored in the display counter 13c and the internal counter 13d are 0, respectively. The values stored in the operator register 13f and the Y register 13b are 0
It may be any value other than.

When a numeric key is pressed, a signal corresponding to the numeric key is generated. The controller 11 receives the signal generated by the numeric key. In response to the generated signal, the initial state 60 passes through the path 80 and the number state 6
Transitions to 1. As a result, the controller 11 increases the value held in the display counter 13c by one. Specifically, the controller 11 calls the value of the display counter 13c, increases the value of the display counter 13c by one, and stores the increased value in the display counter 13c. The controller 11
The numerical value corresponding to the numerical key is stored in the X register 13a. Further, in response to such a transition, the numerical value portion of the display 2 displays the value stored in the X register 13a. The display unit 1 includes a display counter 1
The value stored in 3c is displayed. The operator register 13f, the Y register 13b, and the internal counter 13d maintain 0 before the state transition, that is, 0.

When the numeric key is pressed, the controller 11 receives the signal generated by the numeric key as described above. In response to the generated signal, the numeric state 61
The state transits to the number state 61 through the path 81. The controller 11 calls the value stored in the X register 13a and multiplies the called value by ten. Further, the controller 11 adds the multiplied value by 10 and the numeral corresponding to the numerical key, and stores the added value in the X register 13a. The numerical part of the display 2 displays the value stored in the X register 13a.
The display 2 displays the value stored in the display counter 13c. Operator register 13f and Y register 13b
And the internal counter 13d maintain the value before the state transition.

When a binary operator key is pressed, a signal corresponding to the binary operator key is generated. The controller 11
Receive the signal generated by the binary operator. In response to the generated signal, the numeral state 61 transits to the binary operation state 62 via the path 82. Thus, the controller 11 stores the operator corresponding to the binary operator key in the operator register, calls the value stored in the X register 13a, and stores the called value in the Y register 13b. The value displayed on the display 2 in the binary operation state 62 is the same as the value displayed on the display 2 in the numeral state 61. The X register 13a and the display counter 13c maintain the values before the state transition. When the controller 11 detects that the binary operator key has been pressed, the controller 11 sets the value held in the internal counter 13 d to 1.
One. Specifically, the controller 11 calls the value of the internal counter 13d, increases the value of the internal counter 13d by one, and stores the increased value in the internal counter 13d.

When the numeric key is pressed, the controller 11 receives the signal generated by the numeric key as described above. In response to the generated signal, the binary operation state 62
Transits to the number state 61 through the path 83. As a result, the controller 11 increases the value held in the display counter 13c by one, and the display 2
Display the value of 3c. The controller 11 stores a numerical value corresponding to the numerical key in the X register 13a. The display 2 has X
The value of the register 13a is displayed. Operator register 13f
, The Y register 13b, and the internal counter 13d maintain the values before the state transition.

When the calculation result key [=] is pressed, a signal corresponding to the calculation result key [=] is generated. The controller 11 receives a signal generated by the calculation result key [=]. In response to the generated signal, the number state 6
1 changes to the operation end state 63 through the path 84. As a result, the numeric value input before the binary operator key is pressed and the numeric value after the binary operator key is pressed are calculated based on the relation of the binary operator. Is done. The calculated result is displayed on the numerical value section of the display device 2. When the controller 11 detects that the calculation result key [=] has been pressed, the controller 11 increases the value held in the internal counter 13d by one. Note that the controller 11 may call the value stored in the display counter 13c and store the called value in the internal counter 13d. Further, the display counter 13c maintains the value before the state transition. The display 2 displays the value of the X register 13a and the value of the display counter 13c. The operator register 13
f, the Y register 13b, and the display counter 13c,
Maintain the value before the state transition.

When a numeric key is pressed, the controller 11 receives a signal generated by the numeric key as described above. In response to the generated signal, an operation end state 63
Transits to the number state 64 through the path 87. As a result, the controller 11 clears the display counter 13c and further sets the value held in the display counter 13c to 1
One. The controller 11 stores a value corresponding to the pressed numeric key in the X register 13a. Y register 13
b, internal counter 13d, and operator register 13f
Maintains the value before the state transition.

When the calculation result key [=] is pressed, a signal corresponding to the calculation result key [=] is generated. The controller 11 receives a signal generated by the calculation result key [=]. In response to the generated signal, the number state 6
4 transitions to the operation end state 63 through the path 89. As a result, the value stored in the X register 13a and the value stored in the Y register 13b are calculated based on the relationship between the operators stored in the operator registers. The controller 11 stores the calculated result in the X register 1
3a. Further, the controller 11 calls the value of the internal counter 13d and displays the called value on the display counter 1.
3c. The display 2 displays the value of the X register 13a and the value of the display register. Note that the Y register 1
3b, the operator register, and the internal register maintain the values before the state transition.

When the numeric key is pressed in the numeral state 64, the numeral state 64 transits to the numeral state 64 via the path 88. The change of each register and each counter due to such a transition is the same as the change of each register and each counter when the number state 61 transits to the number state 61 through the path 81, and thus the description is omitted.

When the binary operator key is pressed in the numeral state 64, the numeral state 64 transits to the binary operator state 62 via the path 90. Thus, the controller 11
The operator corresponding to the binary operator key is stored in the operator register. The value displayed on the display 2 in the binary operation state 62 is the same as the value displayed on the display 2 in the numeral state 64. The X register 13a and the display counter 13c maintain the values before the state transition. Controller 11
When the controller 11 detects that the binary operator key is pressed, the controller 11 increments the value held in the internal counter 13d by one, calls the value stored in the X register 13a, and calls the called value Is stored in the Y register 13b.

When the binary operator key is pressed in the operation end state 63, the operation end state 63
The state transits to the term operation state 62. This allows the controller 1
1 stores the operator corresponding to the binary operator key in the operator register. The value displayed on the display 2 in the binomial calculation state 62 is the same as the value displayed on the display 2 in the calculation end state 63. The X register 13a, the display counter 13c, and the Y register 13b maintain the values before the state transition. When the controller 11 detects that the binary operator key is pressed, the controller 11 sets the internal counter 13
Increment the value held in d by one.

FIG. 25 is a flowchart showing an example of the operation of the counter when a calculation result key [=] [%] or the like is input.

At step N41, the controller 11 determines whether or not the numerical key is pressed before the calculation result key is pressed. If the numeric key is pressed immediately before the calculation result key is pressed, the process proceeds to step N43. Otherwise, the process proceeds to step N42.

In step N42, the controller 11 increments the display counter 13c by one in order to count the omitted numeric value or the immediately preceding calculation result key.

At step N43, the controller 11 determines whether or not the binary operator key is pressed before the calculation result key is pressed. If the binary operator key is pressed before the calculation result key is pressed, the process proceeds to step N44.
Otherwise, the process proceeds to step N45.

In step N44, the controller 11 stores the value of the display counter 13c in the internal counter 13d to determine the count displayed on the display 2 as the actual count.

In step N45, the controller 11 determines whether or not the calculation is a constant calculation for holding the number of operations. If the calculation is a constant calculation that holds the number of operations, step N4
Go to 7. Otherwise, the process proceeds to Step N6.

At Step N46, the controller 11 stores the value of the internal counter 13d in the display counter 13c.

At step N47, the controller 11 stores 2 in the display counter 13c. This means "numerals,
This means that a constant calculation equivalent to inputting an expression of "retained operator, retained operation number" is performed.

If the operation has just been performed, step N
Before step 41, a step N40 of clearing the display counter 13c and increasing the counter by one may be added.

(Embodiment 3) An electronic desk calculator 1 according to Embodiment 3 includes a display 2, a keyboard 3, and a controller 11
, A ROM 12, and a RAM 13.

The display 2 displays the numbers and the calculation results and the value of the display counter 13c. The display 2 may be a liquid crystal display device.

The keyboard 3 includes a numeric key for performing a numeric input, a decimal point key, an operator key, a calculation result key such as [=], and a key [tax included] which is pressed when obtaining the tax-inclusive amount and the tax amount. It has.

When a key on the keyboard 3 is pressed, a signal corresponding to the key is output to the controller 11. The controller 11 receives a signal from the keyboard 3 and determines which key in the keyboard 3 has been pressed. The controller 11 performs calculation processing including four arithmetic operations, counting processing of the display counter 13c and the internal counter 13d, comparison processing at the time of verification, display processing of results, and the like.

The ROM 12 stores a program for performing the above-described processing, a program for performing computer graphics, and the like.

The RAM 13 stores operator keys (+,-, ×,
Operator register 1 for storing the operator corresponding to (÷)
3f and a display counter 13c.

The RAM 13 according to the third embodiment has the same X registers 13a and Y as the RAM 13 according to the second embodiment.
A register 13b and an internal counter 13d may be provided.

An example of the operation of the electronic desk calculator according to the third embodiment will be described with reference to FIG. FIG. 11 shows Embodiment 3
5 shows the transition of the display screen of the display 2 and the relationship with the data input by the keyboard 3.

The display screen S51 is an initial screen of the display 2. 00 is displayed in the counter section and 0 is displayed in the numerical section.

[0131] The display screen S52 shows the display screen after the numeral 100 is input and the key [tax] is pressed. On the display screen, the tax-included amount 103 with respect to the numeral 100 is displayed in the numerical value portion, and 01 is displayed in the counter portion.

The display screen S53 further displays a key [tax included].
9 shows the display screen after is pressed. On the display screen,
The tax amount 3 with respect to the numeral 100 is displayed in the numerical portion, and 02 is displayed in the counter portion.

The display screen S54 further includes a key [tax included].
9 shows the display screen after is pressed. On the display screen,
The tax-included amount 103 for the number of entries 100 is displayed in the numerical part,
01 is displayed on the counter section.

The operation of the electronic desk calculator of the present invention including the case where the display 2 of the electronic desk calculator of the present invention displays the display screen S54 from the display screen S51 will be described with reference to FIG. FIG. 12 shows an example of the state transition of the electronic desk calculator of the present invention.

When the user turns on the power switch or presses clear [C], the electronic desk calculator of the present invention is set to the initial state.

When a numeric key is pressed, a signal corresponding to the numeric key is generated. The controller 11 receives the signal generated by the numeric key. In response to the generated signal, the initial state 60 passes through the path 80 and the number state 6
Transitions to 1. As a result, the controller 11 increases the value held in the display counter 13c by one. Specifically, the controller 11 calls the value of the display counter 13c, increases the value of the display counter 13c by one, and stores the increased value in the display counter 13c. Further, in response to such a transition, the controller 11 outputs a signal generated by the numerical keys to the display 2. The numeric portion of the display 2 displays a number corresponding to the numeric key based on a signal generated by the numeric key. The value stored in the display counter 13c is displayed on the counter section of the display device 2.

When the numeric key is pressed, the controller 11 receives the signal generated by the numeric key as described above. In response to the generated signal, the numeric state 61
The state transits to the number state 61 through the path 81. As a result, the controller 11 outputs a signal generated by the numerical keys to the display 2. In the numerical portion of the display 2, a number corresponding to the numerical key is further displayed based on the signal. Since the display counter 13c maintains the value held by itself, the value displayed on the counter unit of the display 2 does not change.

When a key [tax included] is pressed, a signal corresponding to the key [tax included] is generated. The controller 11 receives the signal generated by the key [tax included]. In response to the generated signal, the numeral state 61 transits to the tax-inclusive state 65 through the path 91. This allows the controller 1
1 calculates the tax-included amount and the tax amount for the number entered by the numerical keys. Specifically, the controller 11 multiplies the number input by the numerical keys by 1.03 in order to obtain the tax included amount. The controller 11 calculates the tax amount by:
Multiply the input number by the numerical keys by 0.03. The controller 11 holds the calculation result. Next, the controller 11
Stores 1 in the display counter 13c. Display 2
The value multiplied by 1.03 and the value stored in the display counter 13c are displayed.

Further, when the key [tax included] is pressed, the tax included state 65 transits to the tax amount state 66 through the path 92 in response to the signal corresponding to the key [tax included] as described above. As a result, the controller 11 stores 2 in the display counter 13c. The display 2 displays the already calculated value obtained by multiplying the set number by 0.03 and the value stored in the display counter 13c.

Further, when the key [tax included] is pressed, the tax amount state 66 transits to the tax included state 65 through the path 93 in response to the signal corresponding to the key [tax included] as described above. As a result, the controller 11 stores 1 in the display counter 13c. The display 2 displays the value calculated by multiplying the set number by 1.03 and the value stored in the display counter 13c.

By pressing [tax included] alternately, the tax amount and the tax included amount can be alternately displayed on the numerical value portion of the display 2.

Note that the RAM 13 of the third embodiment is
If the electronic desk calculator of the third embodiment has the register 13a, the Y register 13b, and the internal counter 13d, it operates in the same manner as the electronic desk calculator of the second embodiment.

The operation in the case where the electronic desk calculator of the third embodiment further includes the internal counter 13d will be described below. FIG. 28 is a flowchart showing an example of the operation of the counter when the same key such as the key [tax included] is input.

At step N71, the controller 11 determines whether or not the value displayed on the display 2 is the first calculation result. If the value displayed on the display 2 is the first calculation result, the process proceeds to step N72. Otherwise, the process proceeds to step N73.

At step N72, the controller 11 returns the display counter 13c to the state before the operator key was pressed. When the electronic desk calculator has the internal counter 13d, the controller 11 may store the value of the internal counter 13d in the display counter 13c. When two values are displayed by the key [tax included], the controller 11 may subtract 2 from the value of the display counter 13c.

At step N73, steps N31 to N33 shown in FIG. 24 to be described later are performed.

If the operation has just been performed, step N
Before step 71, a step N70 of clearing the display counter 13c and increasing the counter by one may be added.

(Embodiment 4) The electronic desk calculator 1 of the embodiment 4 comprises a display 2, a keyboard 3, and a controller 11.
, A ROM 12, and a RAM 13.

[0149] The display 2 displays the numbers and the calculation results and the value of the display counter 13c. The display 2 may be a liquid crystal display device.

The keyboard 3 includes a numeric key for performing a numeric input, a decimal point key, an operator key, a calculation result key such as [=], and a key [tax included] which is depressed when obtaining the tax-inclusive amount and the tax amount. It has.

When a key on the keyboard 3 is pressed, a signal corresponding to the key is output to the controller 11. The controller 11 receives a signal from the keyboard 3 and determines which key in the keyboard 3 has been pressed. The controller 11 performs calculation processing including four arithmetic operations, counting processing of the display counter 13c and the internal counter 13d, comparison processing at the time of verification, display processing of results, and the like.

The ROM 12 stores a program for performing the above-described processing, a program for performing computer graphics, and the like.

The RAM 13 stores operator keys (+,-, ×,
Operator register 1 for storing the operator corresponding to (÷)
3f and a display counter 13c for storing the number of digits.

It should be noted that the RAM 13 of the fourth embodiment is similar to the RAM 13 of the second embodiment in that the X registers 13a and Y
A register 13b and an internal counter 13d may be provided.

An example of the operation of the electronic desk calculator according to the fourth embodiment will be described with reference to FIG. FIG. 13 shows Embodiment 4.
5 shows the transition of the display screen of the display 2 and the relationship with the data input by the keyboard 3.

The display screen S55 is an initial screen of the display 2. 00 is displayed in the counter section and 0 is displayed in the numerical section.

The display screen S56 shows the display screen after the numeral 100 is input and the key [tax] is pressed. On the display screen, the tax-included amount 103 with respect to the numeral 100 is displayed in the numerical value portion, and 01 is displayed in the counter portion.

The display screen S57 further displays a key [tax included].
9 shows the display screen after is pressed. On the display screen,
The tax amount 3 for the numeral 100 is displayed in the numerical value part, and 01 is displayed in the counter part.

The display screen S58 further displays a key [tax included].
9 shows the display screen after is pressed. On the display screen,
The tax-included amount 103 for the number of entries 100 is displayed in the numerical part,
01 is displayed on the counter section.

The operation of the electronic desk calculator of the present invention including the case where the display 2 of the electronic desk calculator of the present invention displays the display screen S58 from the above-described display screen S55 will be described with reference to FIG. FIG. 14 shows an example of a state transition of the electronic desk calculator of the present invention.

When the user turns on the power switch or presses clear [C], the electronic desk calculator of the present invention is set to the initial state.

When a numeric key is pressed, a signal corresponding to the numeric key is generated. The controller 11 receives the signal generated by the numeric key. In response to the generated signal, the initial state 60 passes through the path 80 and the number state 6
Transitions to 1. As a result, the controller 11 increases the value held in the display counter 13c by one. Specifically, the controller 11 calls the value of the display counter 13c, increases the value of the display counter 13c by one, and stores the increased value in the display counter 13c. Further, in response to such a transition, the controller 11 outputs a signal generated by the numerical keys to the display 2. The numeric portion of the display 2 displays a number corresponding to the numeric key based on a signal generated by the numeric key. The value stored in the display counter 13c is displayed on the counter section of the display device 2.

When a numeric key is pressed, the controller 11 receives a signal generated by the numeric key as described above. In response to the generated signal, the numeric state 61
The state transits to the number state 61 through the path 81. As a result, the controller 11 outputs a signal generated by the numerical keys to the display 2. In the numerical portion of the display 2, a number corresponding to the numerical key is further displayed based on the signal. Since the display counter 13c maintains the value held by itself, the value displayed on the counter unit of the display 2 does not change.

When a key [tax included] is pressed, a signal corresponding to the key [tax included] is generated. The controller 11 receives the signal generated by the key [tax included]. In response to the generated signal, the numeral state 61 transits to the tax included state 67 through the path 100. In this way, the controller 11 calculates the tax-included amount and the tax amount for the number entered by the numerical keys. Specifically, the controller 11 multiplies the number input by the numerical keys by 1.03 in order to obtain the tax included amount. The controller 11 calculates the tax amount by:
Multiply the input number by the numerical keys by 0.03. The controller 11 holds the calculation result. Next, the controller 11
Stores 1 in the display counter 13c. Display 2
The value multiplied by 1.03 and the value stored in the display counter 13c are displayed.

Further, when the key [tax included] is pressed, the tax included state 67 transits to the tax amount state 68 through the path 101 in response to the signal corresponding to the key [tax included] as described above. As a result, the controller 11 stores 1 in the display counter 13c. The display 2 displays the already calculated value obtained by multiplying the number by 0.03 and the value stored in the display counter 13c.

Further, when the key [tax included] is pressed, the tax amount state 68 transits to the tax included state 65 through the path 102 in response to the signal corresponding to the key [tax included] as described above. As a result, the controller 11 stores 1 in the display counter 13c. The display 2 displays the value calculated by multiplying the set number by 1.03 and the value stored in the display counter 13c. Instead of storing 1 in the display counter 13c, the value of the display counter 13c may be maintained.

Note that the RAM 13 of the fourth embodiment is
If the electronic desk calculator of the fourth embodiment has the register 13a, the Y register 13b, and the internal counter 13d, it operates in the same manner as the electronic desk calculator of the second embodiment.

By alternately pressing [Tax Included], the tax amount and the tax included amount can be alternately displayed on the numerical portion of the display 2.

FIG. 29 is a flowchart showing an example of the operation of the counter when the same key such as the key [tax] is input.

At step N81, controller 11 determines whether or not a key [tax included] has been pressed. When the controller 11 presses the key [tax included], the process ends.
Otherwise, the process proceeds to step N82.

At step N82, steps N31 to N33 shown in FIG. 24 to be described later are performed. After that, this processing ends.

If the operation has just been performed, step N
Before step 81, a step N80 of clearing the display counter 13c and increasing the counter by one may be added.

(Embodiment 5) An electronic desk calculator 1 according to Embodiment 5 includes a display 2, a keyboard 3, and a controller 11.
, A ROM 12, and a RAM 13.

The display 2 displays the numbers and the calculation results and the value of the display counter 13c. The display 2 may be a liquid crystal display device.

The keyboard 3 includes a numeric key for performing a numeric input, a decimal point key, an operator key, [=], [M +]
And a calculation result key such as [M-] and a numeric key [RM] for calling a value stored in the memory.

When a key on the keyboard 3 is pressed, a signal corresponding to the key is output to the controller 11. The controller 11 receives a signal from the keyboard 3 and determines which key in the keyboard 3 has been pressed. The controller 11 performs calculation processing including four arithmetic operations, counting processing of the display counter 13c and the internal counter 13d,
It performs comparison processing at the time of verification, display processing of results, and the like.

The ROM 12 stores a program for performing the above-described processing, a program for performing computer graphics, and the like.

The RAM 13 has an X register 13a, a Y register 13b, an operator register, a display counter 13
c, an internal counter 13d, and a memory counter 13e.
And a work area necessary for other work.

An example of the operation of the electronic desk calculator according to the fifth embodiment will be described with reference to FIG. FIG. 15 shows Embodiment 5
2 shows the relationship between the transition of the display screen of the display 2 and the transition of the values stored in the internal counter 13d and the memory counter 13e.

The display screen S61 is the initial screen of the display 2. In this case, 00 is displayed on the counter portion, and 0 is displayed on the numerical value portion. Further, 0 is stored in both the display counter 13c and the memory counter 13e.

The display screen S62 shows the screen when the input of the numeral 2 is completed. When the numeral 2 is input, 01 is displayed on the counter portion and 2 is displayed on the numerical value portion. The display counter 13c stores 1 and the memory counter 13e maintains 0.

The display screen S63 displays [×] as an operator.
Shows a screen in the case where is input. In this case, the values displayed on the numerical value part and the counter part do not change. The display counter 13c and the memory counter 13e maintain stored values.

The display screen S64 shows the screen when the input of the numeral 3 is completed. In this case, 02 is displayed in the counter section, and 3 is displayed in the numerical section. The display counter 13c stores 2 and the memory counter 13e
Maintain 0.

The display screen S65 displays the calculation result key [M +]
Shows a screen in the case where is input. In this case, 02 is displayed on the counter section, and 6 which is a 2 × 3 calculation result is displayed on the numerical section. The display 2 also displays a symbol M indicating that a numerical value is stored in the memory. The display counter 13c maintains 2. The value 2 stored in the display counter 13c is stored in the memory counter 13e.

The display screen S66 shows a screen when the numeric key [RM] is input. In this case, the value stored in the memory cell is displayed in the numerical part. Also,
The display 2 also displays a symbol M indicating that a numerical value is stored in the memory.

The value 2 stored in the memory counter 13e is stored in the display counter 13c. The memory counter 13e maintains 2.

The display screen S67 displays [×]
Shows a screen in the case where is input. In this case, the values displayed on the numerical value part and the counter part do not change. A symbol M indicating that a numerical value is stored in the memory is also displayed. Display counter 13c and memory counter 13
e maintains the stored value.

The display screen S68 shows the screen when the input of the numeral 3 is completed. In this case, 03 is displayed in the counter section, and 3 is displayed in the numerical section. A symbol M indicating that a numerical value is stored in the memory is also displayed. The display counter 13c stores 3, and the memory counter 13e maintains 2.

The display screen S69 shows a screen when the operation result key [=] is input. In this case, the values displayed on the numerical value part and the counter part do not change. A symbol M indicating that a numerical value is stored in the memory is also displayed. Display counter 13c and memory counter 13e
Keeps the stored value. The numerical part is 6 × 3
Is displayed, and the value stored in the display counter 13c is displayed on the counter section.

The display screen S70 shows the screen when the numeric key [RM] is input. In this case, the value 6 stored in the memory cell is displayed in the numerical value part. The display 2 also displays a symbol M indicating that a numerical value is stored in the memory.

The value 2 stored in the memory counter 13e is stored in the display counter 13c, and the value stored in the display counter 13c is displayed in the numerical value part. The memory counter 13e maintains 2.

The display screen S71 shows a screen when a part 2 of the number is input. The display counter 13c stores 1 and the memory counter 13e maintains 2. The numerical part displays a part 2 of the numerical value, and the display counter 13c displays 01.

Calculation result keys [M +] and [M-]
The operation of the electronic desk calculator including the case where the numeric key [RM] is pressed will be described with reference to FIG. Note that the states and paths shown in FIG. 16 that are the same as the states and paths shown in FIG. 10 are given the same numbers, and descriptions thereof are omitted.

When the calculation result key [M +] or [M-] is pressed, a signal corresponding to the calculation result key [M +] or [M-] is generated. The controller 11 receives the signal generated by the calculation result key [M +] or [M-]. In response to the generated signal, the number state 61
And the operation end state 63 transits to the memory state 69 through each of the paths 110 and 111. Thereby, the controller 11 stores the value stored in the X register 13a and the value stored in the display counter 13c in the work area.

When the numeric key [RM] is pressed, a signal corresponding to the numeric key [RM] is generated. Controller 11
Receives the signal generated by the semi-numerical key [RM]. In response to the generated signal, each state has R
Transition to the M state 70 is made. This allows the controller 11
Stores the respective values stored in the work area in the X register 13a and the display counter 13c.

When a numeric key is pressed, a signal corresponding to the numeric key is generated. The controller 11 receives the signal generated by the numeric key. In response to the generated signal, memory state 69 and RM state 70
Transitions to the number state 61 through each of the paths 112 and 114. The controller 11 stores the numerical value corresponding to the numerical key in the X register 13a, clears the display counter 13c to 0, and increases the value stored in the display counter 13c by one.

When an operator key is pressed, a signal corresponding to the operator key is generated. Controller 11 receives the signal generated by the operator key. In response to the generated signal, the memory state 69 and the RM state 70 transition to the operation state 62 through paths 113 and 115, respectively. The controller 11 stores the numerical value corresponding to the numerical key in the X register 13a,
c is cleared to 0, and the value stored in the display counter 13c is increased by one. The controller 11 stores the operator corresponding to the operator key in the operator register. X register 1
3a, the Y register 13b, and the display register maintain the values stored therein.

FIG. 22 is a flowchart showing an example of the operation of the counter when the numeric keys [0] to [9] and [•] are pressed after the numeric key [RM] is pressed.

At step N11, the controller 11 determines whether or not the numeric key has been pressed immediately before the numeric key is pressed. If the numeric key is pressed immediately before the numerical key is pressed, the process proceeds to step N14. Otherwise, the process proceeds to step N12.

Steps N12 to N16 are the same as those in FIG.
Since these steps are the same as Steps N2 to N6 of Step 1, the description is omitted.

At step N7, the controller 11 adds the value of the display counter 13c and the value of the internal counter 13d in order to include the number of calculations performed on the memory in the number of calculations currently being performed. Is stored in the display counter 13c.

FIG. 27 shows memory keys [M +] and [M-]
9 is a flowchart illustrating an example of the operation of the counter when the user inputs the information.

At step N61, immediately before the memory key is pressed, the controller 11 determines whether or not the binary operator key is pressed. If the binary operator key is pressed immediately before the memory key is pressed, the process proceeds to step N63.
If not, the process proceeds to step N63. For example,
The case where the binary operator key is pressed immediately before the memory key is pressed is a case where [2] [×] [M +] is input.

At step N62, immediately before the memory key is pressed, the controller 11 determines whether or not the unary operator key has been pressed. If the unary operator key is pressed immediately before the memory key is pressed, the process proceeds to step N63.
If not, the process proceeds to step N64. For example,
The case where the unary operator key is pressed immediately before the memory key is pressed is a case where [2] [√] [M +] is input.

At step N63, the controller 11 increments the value of the display counter 13c by one, and proceeds to step N64.

At step N64, controller 11 determines whether or not any operator has already been input. If any operator has been input, the process proceeds to step N65. If not, the process proceeds to step N66.

At Step N65, the controller 11 stores the value of the display counter 13c in the internal counter 13d.

At step N66, the controller 11 adds the value of the memory counter 13e and the value of the display counter 13c, and stores the added value in the display counter 13c.

If the operation has just been performed, step N
Before step 51, a step N50 of clearing the display counter 13c and increasing the counter by one may be added.

(Embodiment 6) An electronic desk calculator 1 according to Embodiment 6 includes a display 2, a keyboard 3, and a controller 11.
, A ROM 12, and a RAM 13. The configurations of the display 2, the keyboard 3, the ROM 12, and the RAM 13 of the fifth embodiment are the same as the corresponding configurations of the second embodiment, and a description thereof will be omitted.

An example of the operation of the electronic desk calculator according to the sixth embodiment will be described with reference to FIG. FIG. 17 shows Embodiment 6
2 shows the relationship between the transition of the display screen of the display 2 and the transition of the values stored in the internal counter 13d and the memory counter 13e.

The display screen S81 is an initial screen of the display 2. In this case, an X register 13a, an operator register 13f, a Y register 13b, and a display counter 13c
And the values stored in the internal counter 13d are 0, respectively. Note that the values stored in the operator register 13f and the Y register 13b may be arbitrary values.

[0213] The display screen S82 shows a screen when the input of the numeral 16 is completed. When the numeral 16 is input, 01 is displayed on the counter portion and 16 is displayed on the numerical value portion. 16 is stored in the X register 13a,
1 is stored in the display counter 13c. Operator register 13f, Y register 13b, internal counter 13
d maintains the previous value, that is, 0.

[0214] The display screen S83 displays [演算 子] as an operator.
Shows a screen in the case where is input. In this case, X
4 which is the square root of 16 is stored in the register 13a, and 4 is displayed on the display unit. The value displayed on the counter does not change. The operator register 13f, the Y register 13b, and the internal counter 13d maintain the previous value, that is, 0.

The display screen S84 displays [√] as an operator.
Shows a screen in the case where is input. In this case, X
The register 13a stores the square root of 4, 2;
2 is displayed on the display unit. 2 is displayed on the counter section. Operator register 13f and Y register 13b
And the internal counter 13d maintain the previous value, that is, 0.

[0216] The display screen S85 shows the screen when the input of the numeral 3 is completed. When the numeral 3 is input, 01 is displayed on the counter portion and 3 is displayed on the numerical value portion. The X register 13a stores 3 and the display counter 13c stores 1. Operator register 13f
, The Y register 13b, and the internal counter 13d maintain the previous value, that is, 0.

The display screen S86 displays [+] as an operator.
Shows a screen in the case where is input. In this case, the values displayed on the numerical value part and the counter part do not change. The value stored in the X register 13a is stored in the Y register 13b, and 3 is maintained in the X register 13a.
The operator corresponding to the operator key [+] is stored in the operator register. 1 is stored in the internal register.

[0219] The display screen S87 shows a screen when the input of the numeral 100 is completed. In this case, 2 is stored in the display counter 13c, and 02 is displayed in the counter section. 103 is stored in the X register 13a, and 103 is displayed in the numerical value part. Operator register 13f
, The Y register 13b, and the internal counter 13d maintain the previous values.

The display screen S88 displays [演算 子] as an operator.
Shows a screen in the case where is input. In this case, X
The register 13a has 10.14 which is the square root of 103.
Are stored, and 10.14... Are displayed on the display unit. The value displayed on the counter does not change.
The operator register 13f, the Y register 13b, and the internal counter 13d maintain the previous values.

The display screen S89 displays [√] as an operator.
Shows a screen in the case where is input. In this case, X
.. Which is the square root of 10.14... Is stored in the register 13a, and 3.18.
・ Is displayed. 3 is stored in the display counter 13c, and 3 is displayed in the counter section. Operator register 1
3f, the Y register 13b, and the internal counter 13d maintain the previous values.

The display screen S90 shows the clear key [CC].
[E] is shown on the screen. The value 3 stored in the Y register 13b is stored in the X register 13a, and 3 is displayed in the numerical value part. 1 is stored in the display counter 13c, and 1 is displayed in the counter section. The Y register 13b and the internal register maintain the previous values.

The operation of the electronic desk calculator including the case where the unary operator key is pressed will be described with reference to FIG. Note that the states and paths shown in FIG. 18 that are the same as the states and paths shown in FIG. 10 are given the same numbers, and descriptions thereof will be omitted.

When the unary operator key [√] is pressed, a signal corresponding to the unary operator key [√] is generated. Controller 11 receives the signal generated by the unary operator key [$]. In response to the generated signal, the numerical state 61 and the operation end state 63 are changed to the paths 120 and 12.
3 to the unary operation state 71. As a result, the controller 11 calculates the square root of the value stored in the X register 13a, and stores the calculation result in the X register 1a.
3a. Display register and operator register 13
f, the Y register 13b, and the internal counter 13d
Maintain the value before the state transition.

When the unary operator key [√] is pressed, the unary operation state 71 passes through the path 121 and returns to the unary operation state in response to the signal generated by the unary operator key [√], as described above. It transits to 71. As a result, the controller 11 calculates the square root of the value stored in the X register 13a, and stores the calculation result in the X register 13a.
Further, the control unit 11 increases the value stored in the display counter 13c by one. Display 2 is X register 1
3a and the value stored in the display counter 13c are displayed. Operator register 13f and Y register 13b
And the internal counter 13d maintain the value before the state transition.

When clear key [C.CE] is pressed, a signal corresponding to clear key [C.CE] is generated. The controller 11 receives the signal generated by the clear key [C · CE]. In response to the generated signal, the unary operation state 71 transits to the clear state 72 via the path 125. Thus, the controller 11 stores the value stored in the Y register 13b in the X register 13a. The controller 11 clears the display counter 13c to 0 and increases the value of the display counter 13c by one. The operator register 13f and the internal counter 13d maintain the values before the state transition.

When a numeric key is pressed, a signal corresponding to the numeric key is generated. The controller 11 receives the signal generated by the numeric key. In response to the generated signal, the unary operation state 71 and the clear state 7
2 transitions to the operation state 62 through each of the paths 122 and 126. The controller 11 stores the numeric value corresponding to the numeric key in the X register 13a, and
Is cleared to 0, and the value stored in the display counter 13c is increased by one. The operator register 13f, the Y register 13b, and the internal counter 13d maintain the values before the state transition.

When the operator key is pressed, a signal corresponding to the operator key is generated. Controller 11 receives the signal generated by the operator key. In response to the generated signal, the unary operation state 71 and the clear state 72 transition to the operation state 62 through paths 124 and 127, respectively. The controller 11 stores the numerical value corresponding to the numerical key in the X register 13a, clears the display counter 13c to 0, and increases the value stored in the display counter 13c by one. The controller 11 stores the operator corresponding to the operator key in the operator register. The X register 13a, the Y register 13b, the display register, and the internal register maintain the values stored therein.

FIG. 24 is a flowchart showing an example of the operation of the counter when the unary operator key [√] or the like is input.

At step N31, the controller 11 determines whether or not the binary operator key has been pressed immediately before the unary operator key is pressed. If the binary operator key is pressed immediately before the unary operator key is pressed, step N3
Go to Step 3; otherwise, go to Step N32.
For example, the case where the binary operator key is pressed immediately before the unary operator key is pressed includes a case where [2] [+] [√] is input.

In step N32, immediately before the unary operator key is pressed, the controller 11 determines whether or not the unary operator key has been pressed. If the unary operator key is pressed immediately before the unary operator key is pressed, step N3
Proceed to 3. If not, the process ends. For example, the case where the unary operator key is pressed immediately before the unary operator key is pressed includes the case where [2] [√] [√] is input.

At Step N34, the controller 11 increases the value of the display counter 13c by one.

Note that immediately after the execution of the operation, step N
Before step 31, a step N30 of clearing the display counter 13c and increasing the counter by one may be added.

The first to sixth embodiments described above are
It may have the following functions. FIG. 19 shows the transition of the state of the display screen of the electronic desk calculator of the present invention.

The display screen S101 shows an initial screen. 0 is displayed in the numerical value portion of the display, and 00 is displayed in the counter portion. Symbols described later are not lit.

The display screen S102 shows the screen after the input of the number 123 is completed. Note that the symbol is not lit.

The display screen S103 shows the screen after the input of the operator key [+] is completed. In this case, a symbol indicating that the operator key has just been pressed is lit. The symbol goes out when any key other than the operator key is input next time.

[0237] The display screen S104 shows the screen after the input of the leading part 4 of the numerical value is completed. The symbol goes out. From this, it can be understood that the number is being set.

The display screen S105 shows the remaining part 5
6 shows a screen after input of 6 and [=] is completed.
Note that the symbol remains off.

As described above, since the symbol is displayed when the operator key is pressed, the user can know whether or not the operator key has been pressed.

FIG. 20 is a flow chart for controlling the lighting and extinguishing of the symbol indicating whether or not the operator key has just been pressed.

In step N101, the controller 11 determines whether or not the operator key has just been pressed, based on the state flag 13g. If the state flag 13g is on, the process proceeds to step N2; otherwise, the process proceeds to step N3.

At step N102, the controller 11 causes the display 2 to light a symbol indicating that the operator key has just been pressed.

At step N103, the controller 11 causes the display 2 to turn off the symbol indicating that the operator key has just been pressed.

(Embodiment 7) The electronic desk calculator 1 according to the embodiment 7 includes a display 2, a keyboard 3, and a switch 4.
, A controller 11, a ROM 12, and a RAM 13.

The display 2 displays the numbers and the operation results, the value of the display counter 13c, a verification symbol indicating that the verification result is correct, and the state of the electronic desk calculator such as the verification state and the total calculation state. At least one of the indicated status display symbols is displayed. The display 2 may be a liquid crystal display device.

The keyboard 3 includes a numeric key for performing a numeric input, a decimal point key, an operator key, [=], [M +]
And [M-], and a key [PRE] used to display the contents of the verification register. Note that the electronic desk calculator of the present invention uses the key [PR
E] instead of the key [GT /
PRE].

When the electronic desk calculator of the present invention has a check function, a switch 4 selects whether or not to use the check function, a TAB switch which specifies a rounding position of the calculation result, A round switch for selecting a method of rounding a calculation result, for example, rounding up, rounding down, rounding, and the like, and a power switch are provided. When the electronic desk calculator of the present invention has a check function and a cumulative calculation function, it may include a selection switch that can use at least one of the check function and the cumulative calculation function.

When a key on the keyboard 3 is pressed, a signal corresponding to the key is output to the controller 11.

Controller 11 receives a signal from keyboard 3 and determines which key in keyboard 3 has been pressed. The controller 11 performs a calculation process including four arithmetic operations, a counter counting process, a comparison process at the time of verification, a result display process, and the like.

The ROM 12 stores a program for performing the above-described processing, a program for performing computer graphics, and the like.

The RAM 13 includes registers, counters, flags, and other work areas 131 necessary for operations.

RAM1 of electronic desk calculator of the seventh embodiment
Reference numeral 3 includes, as registers, an X register 13a, a Y register 13b, an operator register 13f, and a cumulative calculation / verification register 13h. The X register 13a stores a value of a numerical value and a value such as a calculation result. X
The value stored in the register 13a is displayed on the display 2.

RAM1 of electronic desk calculator of the seventh embodiment
3 includes a status flag 13g, a check flag 13i, and a post-check flag 13j as flags.

The following state is stored in the state flag 13g. The value stored in the status flag 13g is
Indicates the state where a numeric value has been entered, the state before the calculation is performed by pressing the operator key, or the state after the calculation is performed by pressing the operator key etc., that is, the state after the operation is performed .
Further, the state flag 13g may be used for symbol lighting control.

The verification flag 13i stores a value indicating whether or not a comparison value for verification is stored in the cumulative calculation / verification register 13h. Check flag 1
In the register 3i, a value indicating which of the comparison value required for the verification and the value in the middle of the cumulative calculation as the memory is stored in the verification / accumulation calculation register is stored.

RAM1 of electronic desk calculator of the seventh embodiment
3 includes a display counter 13c, an internal counter 13d, a memory counter 13e, and a verification counter 13k as counters.

An example of the operation of the electronic desk calculator according to the present invention will be described with reference to FIG.

Display screen S201 shows the initial screen. 00 is displayed in the numerical value part, and 0 is displayed in the counter part.
Is displayed.

In the display screen S202, in order to select the verification mode, the switch is set to the position of V and 1 [+] 2
The value 6 obtained by calculating [+] 3 [=] is displayed. Cumulative calculation /
Since the value to be compared is not stored in the verification register 13h, the V symbol is not turned on. Thereafter, the result of the operation is stored in the cumulative calculation / verification register 13h.

The display screen S203 includes 1 [+] 2 [+]
The value 6 obtained by calculating 3 [=] is displayed. Since the result of the previous calculation (the value stored in the cumulative calculation / verification register 13h) matches the result of the current calculation, a V symbol indicating that the calculation result is correct is lit.

In the display screen S204, 1 [+] 2
A value 7 obtained by calculating [+] 4 [=] is displayed. The V symbol is turned off when 1 is pressed. That is, if any key is pressed while the V symbol is on, the V symbol goes off.

In the display screen S205, in order to select the non-verification mode, the switch is set to the position of ".
The value 5 obtained by calculating [=] is shown. The result of the previous operation (the value stored in the cumulative calculation / verification register 13h) and
Since the result calculated this time does not match, the V symbol indicating that the calculation result matches does not light.

In the display screen S206, in order to select the check mode, the switch is set to the position of V, and 1 [+] 2
A value 7 obtained by calculating [+] 4 [=] is displayed. Since the result calculated last time in the check mode matches the result calculated this time, the V symbol indicating that the calculation result is correct is lit.

[0264] The display screen S207 displays 35 [÷] [PR
E] [=] indicates a value 5 calculated. Key [PR
E] is a key for reading out the calculation result previously stored in the total calculation / verification register 13h in the verification mode. By pressing the key [PRE], the previously saved operation result can be used.

On the display screen S208, in order to select the total calculation mode, set the switch to the GT position and
A value 6 obtained by calculating [×] 3 [=] is shown. The result of the operation is added to the total calculation / verification register 13h, and G
The symbol lights up.

By pressing the key [C] and the key [GT] on the display screen S209, the value stored in the cumulative calculation / verification register 13h is displayed. The value added in the cumulative calculation mode is stored in the cumulative calculation / verification register 13h.

In the display screen S210, the switch is set to the position V in order to select the verification mode, and 5 [×] 78
A value 3945 obtained by calculating 9 [=] is shown. When the above-described calculation is performed, the value used for the verification is stored in the cumulative calculation / verification register 13h, so that the G symbol is turned off.

The display screen S211 shows 5 [×] 89 [=]
Is calculated 445. Since the value stored in the total calculation / verification register 13h is different from the calculated result, the V symbol does not light.

[0269] The display screen S212 shows the calculation results previously stored in the check mode. When the key [PRE] is pressed, it is displayed on the display 2. Display 2
Are not the values shown on the display screen S211 but the values shown on the display screen S210.

By pressing key [PRE] again, the value shown on display screen S210 is displayed on display screen S213. That is, every time the key [PRE] is pressed, the value shown on the display screen S210 and the value displayed on the display screen S211 are displayed.
Can be displayed alternately with the value displayed in.

The display screen S214 is 5 [×] 89 [=]
Is calculated 445. The calculated value 445
And the value displayed on the display screen S211 match, so the V symbol indicating that the calculation result matches is lit.

In the display screen S215, in order to select the non-verification mode, the switch is set to the position of.
A value 2460 obtained by calculating [×] 4 [×] 5 [=] is shown. In this case, the calculated value 2460 is not stored in the cumulative calculation / verification register 13h.

Display screen S216 shows a screen when key [PRE] is pressed.

In the display screen S217, in order to select the check mode, the switch is set to the position of V, and 123 [×]
A value 2460 obtained by calculating 4 [×] 5 [=] is shown.
Since the calculated value 2460 matches the value shown on the display screen S216, the V symbol is turned on.

[0275] The display screen S218 is 123 [x] 20
A value 2460 obtained by calculating [=] is shown. Although the calculated value 2460 matches the value shown on the display screen S216, the V symbol does not light because the counter value is different.

The operation of the electronic desk calculator of the present invention when the display 2 of the electronic desk calculator of the present invention displays the display screen S218 from the display screen S201 described above is shown in FIG.
This will be described with reference to FIGS. FIGS. 31 to 34 show an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 31 shows a flowchart in the case where the calculation result keys [=], [%], etc. are pressed to obtain the calculation result. The processing of the electronic desk calculator of the present invention differs depending on the verification mode, the total calculation mode, and the like.

At step N101, the controller 11 determines whether or not the switch position is at a position indicating the cumulative calculation mode. If the switch position is at the position indicating the cumulative calculation mode, the process proceeds to step N107. If the switch position is not at the position indicating the cumulative calculation mode, the process proceeds to step N102.

At step N102, the controller 11 determines whether or not the switch position is at the position indicating the verification mode. If the switch is located at the position indicating the verification mode, the process proceeds to step N103. If the switch position is not at the position indicating the verification mode, the process ends.

At step N103, the controller 11 checks whether or not the verification flag 13i is on in order to check whether or not the comparison value required for the verification is stored in the cumulative calculation / verification register 13h. to decide. If the check flag 13i is set, the process proceeds to step N104. If the check flag 13i is not set, the process ends. The controller 11 sets the flag of the accumulation calculation / verification register 13h when the comparison value necessary for the verification is stored in the accumulation calculation / verification register 13h.
In addition, as the case where the check flag 13i is not set, there is a case where the calculation is performed for the first time.

At Step N104, the controller 11 sets X
The calculation result stored in the register 13a is compared with the calculation result stored in the cumulative calculation / verification register 13h. An operation result stored in the X register 13a;
If the calculation result stored in the cumulative calculation / verification register 13h matches, the process proceeds to step N105, and if not, the process proceeds to step N106.

At step N105, the controller 11 outputs to the display 2 a signal indicating that the verification results match, and the display 2 lights the verification symbol V according to the signal.

In step N106, when any key is pressed next, the controller 11 sets the post-verification flag 13j to transfer the calculation result to the total calculation / verification register 13h.

When the post-verification flag 13j is not used, the controller 11 may store the calculation result of the X register 13a in the cumulative calculation / verification register 13h. Further, the controller 11 may simultaneously store the value of the calculation counter 13c in the verification counter 13k.

At step N107, the controller 11 checks whether or not the flag of the verification / accumulation calculation flag 13i is on in order to check whether or not the comparison value for verification is stored in the verification / accumulation calculation memory 13h. Judge. verification of accounts/
When the flag of the cumulative calculation flag 13i is set,
Proceed to step N108. Checking / Cumulative calculation flag 13i
If the flag is not set, the process proceeds to step N110.

If the verification result stored for comparison and the total result in the total calculation are not stored in the same area, steps N107 to N1 are performed.
09 may not be executed and the process may proceed to step N110.

At step N108, the controller 11 stores 0 in the verification / accumulation calculation memory 13h in order to clear the value stored in the verification / accumulation calculation memory 13h.

At step N109, the controller 11 resets the verification / accumulation calculation flag 13i because no comparison value for verification is stored in the verification / accumulation calculation memory 13h.

At step N110, the calculation result is
It is accumulated in the accumulation memory 13h. This cumulative operation is
Description is omitted because it is the same as the conventional one.

When the comparison / accumulation calculation flag 13i stores a comparison value for verification in the verification / accumulation calculation memory, the controller 11 may not turn on the accumulation calculation symbol V. .

FIG. 32 shows a flowchart when the key [PRE] (or the key [PRE / GT]) is pressed.

At step N121, when the verification symbol is lit, the controller 11 displays a signal indicating that the verification symbol V is turned off when any key is pressed.
Output to The display 2 turns off the verification symbol V according to the signal. When an arbitrary key is pressed, the controller 11 deletes the operation result stored in the cumulative calculation / verification register 13h. If the pressed key is a numerical key, the controller 11 displays a number corresponding to the numerical key on the display 2.
To be displayed.

At step N122, the controller 11 determines whether or not the post-verification flag 13j is on. If the post-verification flag 13j is on, the process proceeds to step N123. The fact that the post-verification flag 13j is set indicates that the verification has been performed immediately before any key is pressed in step N121. If the post-verification flag 13j is not set, the process ends.

At Step N123, the controller 11
The value stored in the register 13a is stored in the cumulative calculation / verification register 13h.

In step N124, the controller 11 sets the check flag 13i to indicate that the comparison value for check is stored in the cumulative calculation / check register 13h.

In step N125, the controller 11 sets the flag of the post-verification flag 13j to avoid storing the value displayed on the display unit 2 in the cumulative calculation / verification register 13h by a key pressed later. Lower.

When the calculation result is stored in the cumulative calculation / verification register 13h immediately after the verification, the controller 11
Steps N122 to N125 are not performed.

FIG. 33 is a flowchart when the key [PRE] is pressed.

At step N131, controller 11 determines whether or not the switch is at the position indicating the verification mode. If the switch is in the position indicating the verification mode, the process proceeds to step N132. If the switch position is not at the position indicating the verification mode, step N11
Proceed to 34. If the electronic desk calculator of the present invention has a recall function for calling the result of the previous calculation, and the switch is not at the position indicating the verification mode, the process proceeds to step N134.

At step N132, the controller 11 determines whether or not the post-verification flag 13j is on. If the post-verification flag 13j is on, the process proceeds to step N133; otherwise, the process proceeds to step N133.
Proceed to step N134. The fact that the post-verification flag 13j is set indicates that immediately after the calculation result key is pressed and the verification is executed.

At step N133, the controller 11 causes the display 2 to display the operation result stored in the total calculation / verification register 13h, and the total calculation / verification register 13h
Is exchanged with the value stored in the X register 13a.

At step N134, the controller 11 displays the recall value of the total calculation / verification register 13h or the value of the total calculation on the display unit 2 so that the controller 11 displays the recall value or the total value of the total calculation / verification register 13h. Store in X register 13a.

It should be noted that the controller 11 is provided with a check counter 13
A process of storing the value of k in the number-of-operations counter 13c may be performed.

Also, the electronic desk calculator of the present invention uses the key [PR] instead of the key [PRE] and the key [GT].
E] and the key [PRE / G
T], the above processing can be performed by pressing the key [PRE / GT].

FIG. 34 is a flowchart of the processing of the key [PRE].

At step N141, the controller 11 determines whether or not the switch position is at the position indicating the verification mode. If the switch is located at the position indicating the verification mode, the process proceeds to step N142. When the position of the switch is not at the position indicating the verification mode, a process of storing the value displayed on the display 2 as a verification value is performed.
Proceed to step N146.

In step N142, the controller 11 determines whether the check flag 13i is on. When the flag is set, the process proceeds to Step N143. If the flag is not set, this processing ends. This is because the previous calculation result is not stored in the cumulative calculation / verification register 13h, and it is meaningless to display it.

The processing in steps N143 to N145 is performed in steps N132 to N13 shown in FIG.
4, the description is omitted.

In step N146, the controller 11 stores the value displayed on the display 2 in the cumulative calculation / verification register 13h, so that the controller 11 stores the value stored in the X register 13a in the cumulative calculation / verification register 13h. Store. In addition, the electronic desk calculator of the present invention may be provided with a key that performs only the processing of step N146 and step N147.

In step N147, the controller 11 sets the flag indicating that the comparison value used for the verification is stored in the accumulation calculation / verification register 13h in the verification flag 13
Stand with i.

[0311]

Since the electronic desk calculator of the present invention includes the display counter 13c, even if the calculation position is lost during the calculation, the current calculation position can be easily known from the display count. it can. When a plurality of formulas are calculated successively, the value of the display counter 13c becomes 1 by inputting a numerical value, so that a clear key is not required. Therefore, the operability is improved. In the electronic desk calculator of the present invention, regardless of whether the operation execution key is pressed,
The value of the display counter 13c is increased. The display counter 13c can keep the correct number even when an incorrect operation is corrected during the calculation. Even if some key inputs are omitted using the constant calculation function, the display counter 13c can keep the correct number obtained by adding the omitted number. The counter can maintain the correct number of operations regardless of the number of times the key is pressed, even for special operator keys such as displaying several values in a circular manner. Even when the calculation is performed together with the memory calculation, when the value stored in the memory is called, the counting of the value stored in the memory can be called. Even if an extra operation unrelated to the operation is performed in the middle of the operation and the continuation of the operation is performed, the counter maintains the correct number of operations, thereby improving the practicality of the counter.

[0312] Since the electronic desk calculator of the present invention compares the comparison target with the calculation result, errors are less likely to occur than when the user performs the visual comparison, and the time required to obtain the comparison result is short. It is possible to reduce the number of components such as RAM and ROM capacity required when realizing a device having both the check function and the recall function. It is possible to reduce the number of components such as RAM and ROM capacities and the number of keys required for realizing a device having both the check function and the cumulative calculation function. When the result is different in the verification, the previous result can be actually confirmed, and the practicality of the verification function is improved. Also, since only one numerical value display unit is required, the number of parts can be reduced with respect to the conventional check function. When the result is different in the check, it is possible to freely switch between the previous result and the present result, and it is possible to select which to use for the next calculation, so that the practicality of the check function is improved. The results of calculations that cannot be used for checking, or values that deviate from the original checking, such as when the user forgot to enter the checking mode and the results are known from the beginning, can be used for checking, making the checking function practical. Is improved. In order to realize a device having both a value calling and an input in the reconciliation function, only one key is required and the number of parts can be reduced. Practicality of the check function which can perform a stricter comparison than comparing only the numerical value of the result in the check function is improved.

Even if the calculation position is lost during the calculation of a slip or the like during the calculation, it is easy to know from the display how far the input has been made and the operability is improved.

[Brief description of the drawings]

FIG. 1 is an external view of an electronic desk calculator according to an embodiment of the present invention.

FIG. 2 is an example of a block diagram of an electronic desk calculator of the present invention.

FIG. 3 is an example of a display screen of the first embodiment.

FIG. 4 is an example of a state transition diagram of the first embodiment.

FIG. 5 is an example of a display screen of the first embodiment.

FIG. 6 is an example of a state transition diagram of the first embodiment.

FIG. 7 is an example of a display screen of the first embodiment.

FIG. 8 is an example of a state transition diagram of the first embodiment.

FIG. 9 is an example of a display screen according to the second embodiment.

FIG. 10 is an example of a state transition diagram of the second embodiment.

FIG. 11 is an example of a display screen according to the third embodiment.

FIG. 12 is an example of a state transition diagram of the third embodiment.

FIG. 13 is an example of a display screen of the fourth embodiment.

FIG. 14 is an example of a state transition diagram of the fourth embodiment.

FIG. 15 is an example of a display screen according to the fifth embodiment.

FIG. 16 is an example of a state transition diagram of the fifth embodiment.

FIG. 17 is an example of a display screen of the sixth embodiment.

FIG. 18 is an example of a state transition diagram of the fifth embodiment.

FIG. 19 is an example of a display screen of the electronic desk calculator of the present invention.

FIG. 20 is an example of a state transition diagram of the electronic desk calculator of the present invention.

FIG. 21 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 22 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 23 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 24 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 25 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 26 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 27 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 28 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 29 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 30 is an example of a display screen of the seventh embodiment.

FIG. 31 is an example of a state transition diagram of the seventh embodiment.

FIG. 32 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 33 is an example of a flowchart of the electronic desk calculator of the present invention.

FIG. 34 is an example of a flowchart of the electronic desk calculator of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic desk calculator 2 Display 3 Keyboard 4 Switch 11 Controller 12 ROM 13 RAM

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Miho Ohba 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka F-term (reference) 5B019 HE07 HE08 HE18

Claims (1)

[Claims] An expression is input, an operation of the input expression is performed, the operation result can be added to or subtracted from a memory, a value stored in a memory is called, and the called value is converted in accordance with a numeral. An electronic desk calculator having a function that can be used as a value in an expression, wherein when adding / subtracting the result of the expression that performed the operation to / from the memory, the value of the number-of-operations counter is added simultaneously with the counter for the memory. An electronic desk calculator which adds a value of a counter of the memory simultaneously with a counter of the number of operations when performing an operation using a value of the memory in a formula according to a numerical value.