JPH08161270A - Electronic computer - Google Patents

Abstract

PURPOSE: To provide an electronic computer with excellent operability in which the necessity of performing the same calculation operation repeating for three times as in a conventional check processing is eliminated and the portion where a calculation mistake is generated becomes possible to be easily discovered. CONSTITUTION: When the calculation expression for a check is inputted in a state that a 'check' key 12g is operated and a check mode is set, the matching/unmatching with the each calculation term corresponding to check object calculation expressions is compared and judged for every input term composed of the combinations of the numerical values and operators. When the unmatching is decided, the fact the an input mistake is generated is notified by announcing sound 'peep', the calculation item on the side of the check object calculation expression and the calculation item on the side of the calculation expression for check for which the unmatching is judged are switched and displayed for every operation of a 'confirmation' key 12h and where the input mistake is generated can be confirmed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic computer that executes calculation processing according to an input calculation formula.

[0002]

2. Description of the Related Art For example, in a widely used electronic computer, after inputting a certain formula and displaying an answer by operating the equal “=” key, it is necessary to judge whether or not the calculation is correctly performed. Needs to perform the verification operation again.

In the conventional verification operation, the answer obtained by the calculation process to be verified is written down with a memo or the like, the same calculation formula is input again, and the answer displayed by operating the "=" key. This is done by comparing.

In this case, the answer obtained by the first calculation and the answer obtained by the verification are in agreement or inconsistency, so that it is possible to judge whether or not the calculations are correctly performed.

However, when the first calculation result and the verification result do not match, it can be judged that there is a mistake in one of the calculation operations, but whether a mistake has occurred in the first calculation or in the verification. I can't tell if a mistake has occurred.

Therefore, when the verification results do not match, it is necessary to perform the verification operation for the second time to check whether the first calculation or the verification for the first time has a mistake. There is a problem that the same calculation operation is repeated three times.

On the other hand, in a conventional electronic computer, when the calculation of a part or most of the calculation formulas is the same and only the other parts are different, the whole calculation formula is calculated each time. There is a problem that a new input is required and a troublesome input operation must be repeated.

[0008]

Therefore, in the above-mentioned conventional electronic computer, the operability is very poor when the verification results do not match or when the calculation processing of the approximate calculation content is repeatedly performed. There is.

The present invention has been made in view of the above problems. A first object of the present invention is to easily find a location where a calculation error has occurred without having to repeat the same calculation operation three times. An object of the present invention is to provide an electronic computer having a good operability.

A second object of the present invention is to eliminate the troublesome input operation when the calculation processing of the approximate calculation content is repeatedly performed without having to newly input the entire calculation formula each time the calculation is performed. It is to provide an electronic computer with good operability that enables the following.

[0011]

That is, a first electronic computer that has achieved the first object of the present invention is an expression inputting means for inputting calculation expression data and a calculation expression input by this expression inputting means. Input type storage means for sequentially storing data,
Mode setting means for setting a verification mode, and in the setting state of the verification mode, calculation formula data sequentially input by the formula input means and calculation formula data stored in the input formula storage means / The non-coincidence is sequentially compared and judged, and if the non-coincidence is judged by the formula comparing means, the non-coincidence of the input calculation formula data and the stored calculation formula data are displayed. .

A second object of the present invention is to achieve the second object.
The electronic computer of (1) stores the formula input means for inputting the formula data, the input formula storing means for sequentially storing the formula data input by the formula input means for each input term, and the input formula storing means. Storage formula calling means for sequentially displaying and displaying the calculated formula data from the beginning to an arbitrary term, and calculation formula data input by the formula input device is displayed by the storage formula calling device on the input formula storage device. And a stored calculation formula data rewriting means for storing the calculated formula data in succession.

[0013]

That is, in the first electronic computer, in the setting state of the verification mode, there is a match / mismatch between the formulas sequentially input by the formula input means and the formulas already stored in the input formula storage means. When the comparison means sequentially makes a comparison judgment, and when this formula comparison means makes a disagreement,
Since the mismatch data for each of the input calculation formula and the stored calculation formula for which the mismatch is judged is displayed, the formula data in which the calculation error occurs can be directly confirmed.

Further, in the second electronic computer, the formula input means in a state where the formulas already stored in the input formula storage means are sequentially called and displayed from the head to an arbitrary term by the storage type calling means. Since the calculation formula input by the above formula is stored in the input formula storage means following the calculation formula called and displayed by the storage type call means, the common part in the calculation formula is rewritten to a new calculation formula as it is. Will be done.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an electronic circuit of an electronic computer embodying the present invention.

This electronic computer has a CPU 11. The CPU 11 activates a system program stored in advance in the ROM 13 in accordance with a key operation signal from the key input unit 12 and executes operation control of each unit of the circuit associated with various calculation processes. , The key input unit 12, the ROM 13, and the RAM 14
And the liquid crystal display unit 16 is connected via the display drive circuit 15.

In addition, the CPU 11 includes an amplifier circuit 17
The speaker 18 is connected via. The key input section 1
The numeral 2 includes a numerical key including a decimal point which is operated when inputting a numerical value such as a calculation formula, and function keys such as +, −, ×, ÷, and =, that is, “0” to
Numeric keys 12a up to "9", "+" key 12b,
"-" Key 12c, "x" key 12d, "÷" key 12
An operator key consisting of e, an “=” key 12f, a decimal point key (not shown) and the like are provided. Further, the “verification” key 12g operated when setting the verification mode, the numerical value and operator of the current input item of the calculation formula input for the verification in the setting state of the verification mode, and the object to be verified. "Confirm" key 12h operated when switching and displaying the numerical value and operator of the corresponding term of the calculation formula, and when setting the rewriting calculation mode when repeating the calculation processing of the approximate calculation content "Call" key 12 operated
i. In the verification calculation process, it is operated when the calculation result of the calculation formula input for the verification and the calculation result of the calculation formula to be verified are switched and displayed. The "▽" key (forward direction read key) 12j, "△", which is selected and operated when the calculation formula already stored in the input formula register 14b (see FIG. 2) is read out and displayed for each item from the beginning. Key (reverse reading key) 12
k, in the verification calculation process, it is operated when deleting the data being displayed, and in the rewriting calculation process, the calculation that is read out and displayed according to the operation of the "▽" key 12j, "△" key 12k. Following the formula, the input formula register 14 in the RAM 14
A "deletion" key 12i and the like that are operated when deleting the calculation formula data stored in b (see FIG. 2) in the part after the calculation formula being displayed are provided.

The ROM 13 stores in advance a system program that controls the overall operation of the electronic computer, as well as subprograms corresponding to various calculation modes such as a normal calculation processing program, a verification calculation processing program, and a rewrite calculation processing program. It

FIG. 2 is a diagram showing the configuration of registers in the RAM 14 of the electronic computer. In the RAM 14, for example, a display register 14a in which data to be displayed to be displayed on the liquid crystal display unit 16 such as numerical values and functions entered by keys are written, a numeric key 12a of the key input unit 12 and various operator keys 12b to 12e. The input formula register 14b in which the calculation formula input in accordance with the operation of is written in the display register 14a is sequentially stored for each input term consisting of the numerical value and the operator, and the calculation stored in the input formula register 14b. The answer register 14c that stores the calculation result according to the formula, and the calculation formula that is stored in the input formula register 14b when the verification mode is set are the answer register 1
In the register 14d to be measured, which is transferred and stored as a calculation target calculation formula together with the calculation result stored in 4c, the verification mode flag register F which is set to "1" in the setting state of the verification mode, and the setting state of the verification mode. "Verification"
Numerical value of the calculation formula for verification according to the operation of the key 12h,
Confirmation flag register G that is set to "1" when the operator is displayed, the numerical value of the calculation target calculation formula, and "0" when the operator is displayed, and "1" when the rewrite calculation mode is set The rewrite calculation mode flag register E set to 1 and the deletion flag register C set to "1" by deleting the numerical value input in the setting state of the verification mode are provided.

Next, the verification calculation processing operation of the electronic computer having the above configuration will be described. FIG. 3 is a flow chart showing a verification calculation process which is a process of normal calculation and verification by the electronic computer.

FIG. 4 is a diagram showing a display operation corresponding to a key operation accompanying the verification calculation processing of the electronic computer. For example, when not in the verification mode (when F is “0”), “513
In order to calculate “+257 + ... =”, first, as shown in FIG. 4A, if the numeral keys 12a and the “+” keys 12b of the key input unit 12 are operated to input “513+”, “+ It is determined in step S1 that the operation has been performed, and the process proceeds to step S2. After it is determined that the verification mode flag register F in the RAM 14 is "0",
At 3, the numerical value “513” and the operator “+” of the input term are stored in the input expression register 14b. In the next step S4, "513" and "+" which have been keyed in the display register 14a are displayed on the liquid crystal display unit 16.

Next, when "257" shown in FIG. 4 (B) is input, this numerical value is written in the display register 14a and displayed on the liquid crystal display section 16, and when "+" is subsequently input, After it is judged that the verification mode flag register F in the RAM 14 is "0", the numerical value "25" of the input item concerned.
7 ”and the operator“ + ”are additionally stored in the input expression register 14b, and the number“ 770 ”obtained by adding“ 513 ”and“ 257 ”is stored in the answer register 14c and displayed on the liquid crystal display unit 16. (Steps S1 → S2 → S
3, S4).

Thereafter, similarly to the above, the desired calculation formula is keyed in for each term, and the processes of steps S1 to S4 are repeated, and the input calculation formula is input with numerical values and operators. Each term is sequentially stored in the input-type register 14b and the calculation result is stored in the answer register 14c.
Further, it is displayed on the liquid crystal display unit 16.

When the "=" key 12f is operated as shown in FIG. 4 (C) while the desired calculation formula is input, this is detected in step S5, and the final calculation is performed in step S6. The processing is executed, and the calculation result "1740" is stored in the answer register 14c and displayed on the liquid crystal display unit 16 (steps S7, S).
4).

In the calculation process of step S6, although not shown, in the verification mode to be described later, after the calculation of the verification formula is performed and the final calculation result is obtained, this result is used as the data of the answer register 14c. By comparing, it is determined whether or not the final results match, and if they do not match, a notification is given.

When the "verification" key 12g is operated to perform the verification of the calculation process, the calculation formula stored in the input formula register 14b is transferred to the test formula register 14d as the verification target calculation formula. Remembered,
"1" is set in the verification mode flag register F, and C
PU11 is set to the verification mode (step S8 → S)
9, S10). When "1" is set in the register F, the CPU 11 causes the liquid crystal display section 16 to display the character "verifying" as shown in FIG.

Then, as shown in FIG. 4D, in order to input a calculation formula for verification, first, by inputting "513", it is judged that the verification mode flag register F is "1". After that, the input numerical value "513" is stored in the input expression register 14b and is displayed on the liquid crystal display unit 16 after it is determined that the input is not an operator input (step S).
1 → S2 → S11, S12 → S4).

Subsequently, when "+" is input, it is determined that the verification mode flag register F is "1", the input operator "+" is additionally stored in the input expression register 14b, and the operation is performed. After it is judged that the input is a child input, the numerical value “513” and the operator “+” stored in the input expression register 14b by the input of the calculation term this time, and the verification stored in the to-be-tested expression register 14d are stored. The numerical value “513” of the corresponding calculation term of the target calculation formula and the operator “+” are compared with each other to determine whether they match or not (step S1 →
S2 → S11, S12 → S13, S14).

In this case, since the numerical value of the calculation term and the operator "513+" input this time for verification are the same as the numerical value of the corresponding calculation term and the operator "513+" of the calculation target expression, it is determined that there is no difference and a match is determined. Then, the display state “513+” is continued as it is (step S14 → S).
4).

Next, as shown in FIG. 4E, when the numerical values of the two items of the calculation formula for verification are input as "267",
After determining that the verification mode flag register F is "1", the input numerical value "267" is changed to the input expression register 14b.
And is displayed on the liquid crystal display unit 16 (step S1 → S).
2 → S11, S12 → S4).

Then, as shown in FIG. 4 (F), "+"
Is input, it is determined that the verification mode flag register F is “1”, the input operator “+” is additionally stored in the input expression register 14b, and it is determined that the input is an operator. After that, the numerical value “267” and the operator “+” stored in the input expression register 14b by the input of the present calculation term and the corresponding calculation term of the calculation target calculation expression transferred and stored in the calculation target expression register 14d Numerical value "25
7 ”and the operator“ + ”are compared, and the match / mismatch is determined (steps S1 → S2 → S11, S12 →
S13, S14).

In this case, the numerical value and the operator "267+" of the calculation term input this time for verification are different from the numerical value and the operator "257+" of the corresponding calculation term of the equation to be inspected. If it is determined that they do not coincide with each other, in the next step S15A, the speaker 18 outputs a sound signal "beep" to inform that the input error has occurred through the amplifier circuit 17 (step S1).
4 → S15).

That is, when the calculation formulas for verification are sequentially input, for each calculation item delimited by the input of the operator, the comparison judgment of the match / mismatch with the corresponding calculation item of the calculation formula to be verified is made. If it is executed and a mismatch is determined,
It will be reported as a place where an input error occurs. Then, in the next step S15B, the confirmation flag register G
Is set to "0".

Here, as shown in FIG. 4G, when the "confirm" key 12h is operated, it is determined that the verification mode flag register F is "1", and the confirmation flag register G is "0". After it is determined that there is, the above step S14
In addition to displaying the numerical value of the calculation term and the operator "257+" in the calculation formula to be verified,
The confirmation flag register G is switched from "0" to "1" and set (steps S16 → S17 → S18 → S1).
9, S20).

Further, as shown in FIG. 4H, when the "confirm" key 12h is repeatedly operated, it is judged that the verification mode flag register F is "1", and the confirmation flag register G is "1". After that, the numerical value of the calculation term and the operator "267+" in the input calculation formula for verification, which is determined to be inconsistent in step S14, are displayed, and the confirmation flag register G is changed from "1". It is set back to "0" (steps S16 → S17 →
S18 → S21, S22).

That is, every time the "confirm" key 12h is operated, the numerical values and operators of the corresponding calculation terms of the verification target calculation formula and the input calculation formula for verification which are determined to be inconsistent in step S14 are It is displayed by being switched alternately. Depending on this, whether there is an input error in the calculation term of the verification target calculation formula that was initially calculated, or whether there is an input error in the calculation term in the input calculation formula for verification. Can be confirmed.

Then, for example, assuming that there is an input error in the calculation item in the input formula for verification or in the first input formula, the numerical value and operation of the input item shown in FIG. 4 (G) or (H). When the "Delete" key 12m is operated with the child "257+" or "267+" displayed,
This is detected in step S23, and the next step S24
In A, the numerical values and operators “257+” and “267+” of the input term due to the input error are deleted from the equation to be measured register 14a and the input expression register 14b, respectively, and the input of the correct numerical value and operator is waited for. Then, in step S24B, when it is determined that the mode is the verification mode, the flag C is set to "1".

Here, in order to continue the verification calculation processing, FIG.
As shown in (J), when the calculation item “257+” consisting of correct numerical values and operators according to the verification target calculation formula is input, it is determined in step S2 that the verification mode flag register F is “1”. In step S11, it is determined that the flag C is "1", and the input calculation term "257+" is additionally stored in place of the deleted calculation terms "257" and "267+" of the registers 14d and 14b. . Also, the calculation of the expression consisting of the numerical value and the operator stored in the test expression register 14d is performed again, and the result is written in the answer register 14c. After this process,
The flag C is reset to "0".

As a result, the erroneous input of the first calculation formula or the calculation formula for verification is eliminated, and thereafter, the process of judging and confirming the input error for each input item is repeated in the same manner as described above. Then, the input of the verification calculation formula is completed, and the calculation results are compared in step S6 by operating the "=" key 12f, as described above. Further, when the "▽" key 12j or the "△" key 12k is selected and operated in the state where the calculation result is displayed, the calculation target calculation formula or the input formula register 14 already stored in the calculation target formula register 14d.
The calculation formula for verification stored in b is selectively and sequentially switched and displayed (step S25 →
S26).

Therefore, when inputting a calculation formula for verification, a comparison is made with the calculation formula to be verified for each input term, and the calculation item that does not match is operated by the "confirm" key 12h. Since each of them is alternately switched and displayed, it is possible to very easily confirm which part of the verification target calculation formula side or the verification calculation formula side has an input error.

Next, the rewriting calculation processing operation of the electronic computer having the above configuration will be described. FIG. 5 is a flowchart showing a rewrite calculation process by the electronic computer. FIG. 6 is a diagram showing a display operation corresponding to a key operation accompanying the rewriting calculation processing of the electronic computer.

First, as shown in FIG. 6A, for example, "56 + 78 +" is selected by selectively operating the numeral keys 12a, the "+" key 12b, and the "=" key 12f of the key input unit 12.
52 = ”is input, it is determined that the rewriting calculation mode flag register E in the RAM 14 is“ 0 ”, and the input expression is stored in the input expression register 14b.
The calculation processing according to the input formula is executed, the calculation result is stored in the answer register 14c, and the liquid crystal display unit 16
Is displayed (steps A1 → A2 → A3, A4).

Thus, the first calculation process is completed, and the calculation formula "56 + 78 + 52" is changed to the input formula register 14 described above.
When the "call" key 12i is operated in the state stored in b, the rewrite calculation mode flag register E is set to "1" and the CPU 11 is set to the rewrite calculation mode (steps A5 → A6).

Then, as shown in FIGS. 6B and 6C, when the “∇” key 12j is operated, the rewriting mode flag register E is set to “1” for each key operation. After the judgment, the calculation formulas stored in the input formula register 14b are sequentially read from the first input item,
It is displayed as a combination of numerical values and operators for each term (steps A7 → A8 → A9, A4).

Here, as shown in FIGS. 6 (B) and 6 (C), up to the second calculation term of the calculation formula stored in the input formula register 14b, "56+" and "78+". When the "Delete" key 12m is operated in the read-out display state, each item of the calculation formula stored in the input formula register 14b (in this case, "52") following the currently displayed calculation item "78+" and thereafter. ) Is deleted (step A10 →
A11 → A12).

Then, as a common calculation formula, up to the second calculation item "56 + 78 +" read and displayed by the operation of the "▽" key 12j, a new calculation item "63 + 73" is displayed as shown in FIG. 6 (D). When sequentially input, it is determined that the rewrite calculation mode flag register E is "1", and the common calculation formula "56+" is input to the input formula register 14b.
78+ ”, a new calculation term“ 63 + 73 ”is additionally stored (steps A1 → A2 → A13, A4). As a result, the calculation formula stored in the input formula register 14b is not rewritten in its entirety. It is rewritten as a new calculation formula “56 + 78 + 63 + 73”, and here, as shown in FIG. 6E, the “=” key 12
When f is operated, calculation processing is executed according to the rewritten new calculation formula, and the calculation result is returned to the answer register 14
It is stored in c and displayed on the liquid crystal display unit 16.

On the other hand, when it is determined that the rewrite mode flag register E is "0" when the "delete" key 12m is operated, the data being displayed is deleted (steps A10 → A11). → A14, A4).

Therefore, an arbitrary range of the calculation terms read out from the input formula register 14b and displayed by the "call" key 12i is set as a common calculation formula, and thereafter, new calculation items sequentially input are set to the common calculation formula. Since it is continuously stored and rewritten as a new calculation formula, a large number of approximate calculation formulas can be input and calculated very easily.

Therefore, according to the electronic computer having the above-mentioned configuration, when the calculation formula for the verification is input in the state where the "verification" key 12g is operated to set the verification mode, the numerical value and the operator are combined. For each input term, the match / mismatch with each corresponding calculation term of the verification target calculation formula is compared and judged, and when the mismatch is judged, it is notified by a beeping sound that there is an input error. As well as
Each time the "confirm" key 12h is operated, the calculation item on the side of the verification target calculation formula and the calculation item on the side of the calculation formula for verification, which are determined to be inconsistent, are switched and displayed, so that it is possible to confirm which input error has occurred. Even if the same calculation process is repeated three times as in the conventional verification process and only the calculation results are not compared, the location of the input error can be found with a very simple operation.

Further, according to the electronic computer having the above construction, when the "call" key 12i is operated and the "▽" key 12j is operated while an arbitrary formula is stored in the input formula register 14b, the stored calculation is carried out. Each calculation term of the formula is sequentially read from the beginning as a common calculation term and displayed. After that, when any numerical value and operator are repeatedly input as a new calculation term, the newly input calculation term becomes the common calculation term. Since it is stored in the input formula register 14b following the term and is rewritten with a new calculation formula, it is not necessary to input the whole of the calculation formula as in the case of processing a large number of approximate calculation formulas. , A new calculation process can be sequentially performed by rewriting only the portion of different calculation contents.

[0051]

As described above, according to the first electronic computer of the present invention, in the setting state of the verification mode, the formulas sequentially input by the formula input means and the input formula storage means are already stored. If the match / mismatch with the calculation formula is sequentially compared and judged by the formula comparing unit, and if the formula comparing unit judges the mismatch, the mismatch data of the input calculating formula and the stored calculation formula are displayed. Therefore, it becomes possible to directly confirm the formula data in which the calculation error occurs.

Further, according to the second electronic computer of the present invention, in the setting state of the verification mode, the input items of the formulas sequentially input by the formula input means and the formulas already stored in the input formula storage means. If the match / mismatch with each term is compared and judged by the formula comparing means in sequence, and if the formula comparing means judges the mismatch, the non-matching terms of the input calculation formula and the memory calculation formula are displayed. Therefore, it becomes possible to directly check the term of the calculation formula in which the calculation error occurs.

Therefore, it is possible to provide an electronic computer with good operability, which makes it possible to easily find a location where a calculation error has occurred without having to repeat the same calculation operation three times. Further, according to the third electronic computer of the present invention, the formula input is performed while the calculation formulas already stored in the input formula storage means are sequentially called and displayed from the head to an arbitrary term by the storage type calling means. The calculation formula input by the means is stored in the input formula storage means following the calculation formula called and displayed by the storage type calling means, so that the common part in the calculation formula remains as a new calculation formula. You will be able to rewrite.

Therefore, when the calculation process of the approximate calculation content is repeatedly performed, it is not necessary to newly input the whole calculation formula each time the calculation is performed, and the troublesome input operation can be omitted. An electronic calculator can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an electronic circuit of an electronic computer according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a register in a RAM of the electronic computer.

FIG. 3 is a flowchart showing a verification calculation process by the electronic computer.

FIG. 4 is a diagram showing a display operation corresponding to a key operation, which accompanies a verification calculation process of the electronic computer.

FIG. 5 is a flowchart showing a rewrite calculation process by the electronic computer.

FIG. 6 is a view showing a display operation corresponding to a key operation accompanying the rewriting calculation processing of the electronic computer.

[Explanation of symbols]

11 ... CPU, 12 ... Key input section, 12a ... Numeric key,
12b ... "+" key, 12c ... "-" key, 12d ...
"X" key, 12e ... "÷" key, 12f ... "=" key, 12g ... "verification" key, 12h ... "confirmation" key, 1
2i ... "Call" key, 12j ... "▽" key, 12k ...
"△" key, 12m ... "Delete" key, 13 ... ROM, 1
4 ... RAM, 14a ... Display register, 14b ... Input formula register, 14c ... Answer register, 14d ... Calculating formula register, F ... Verification mode flag register, G ... Confirmation mode flag register, E ... Rewriting calculation mode flag register, C ... Delete flag register, 15 ... Display drive circuit, 1
6 ... Liquid crystal display part, 17 ... Amplifier circuit, 18 ... Speaker.

Claims (9)

[Claims] 1. A formula input means for inputting calculation formula data, an input formula storing means for sequentially storing the calculation formula data input by the formula input means, a mode setting device for setting a verification mode, and the verification mode. Formula setting means for sequentially comparing and judging whether the calculation formula data sequentially input by the formula input means and the calculation formula data stored in the input formula storage means are compared with each other, An electronic calculator comprising: non-coincidence data display means for displaying the inputted calculation formula data determined to be non-coincident with each other and the calculation formula data stored in the input formula storage means. 2. The non-coincidence data display means includes a switching display means for alternately switching and displaying the input calculation formula data and the calculation formula data stored in the input formula storage means. The electronic computer according to claim 1. 3. The mode setting means includes a verification key for setting the verification mode, and mode display means for displaying that the verification mode has been set by the verification key. The electronic calculator described in 1. 4. An informing means for informing that the inconsistency is detected by the expression comparing means, wherein the inconsistency data display means is stored in the input calculation expression data and the input expression storing means. 2. The electronic computer according to claim 1, further comprising switching display means for alternately switching and displaying the calculated formula data. 5. A formula input means for inputting calculation formula data composed of a plurality of input items, with numerical data and function data as one input item, and calculation formula data inputted by the formula input device for each input item. Input mode storage means for sequentially storing the calculation mode data, mode setting means for setting the verification mode, input items of the calculation formula data sequentially input by the formula input means and the input formula storage means in the setting state of the verification mode. Expression comparison means for sequentially comparing and judging whether or not the terms of the stored calculation expression data match with each other, and the input calculation expression data judged as non-match by the expression comparison means and stored in the input expression storage means. An inconsistent data display means for displaying the calculated formula data, and an electronic calculator. 6. The non-coincidence data display means includes a switching display means for alternately switching and displaying the input calculation formula data and the calculation formula data stored in the input formula storage means. The electronic computer according to claim 5. 7. The mode setting means comprises a verification key for setting the verification mode, and further comprises mode display means for displaying that the verification mode is set by the verification key. The electronic calculator described in 5. 8. An informing means for informing that the inconsistency is detected by the expression comparing means, wherein the inconsistency data displaying means is stored in the input calculation expression data and the input expression storing means. 6. The electronic computer according to claim 5, further comprising switching display means for alternately switching and displaying the calculated formula data. 9. An expression input means for inputting calculation expression data, an input expression storage means for sequentially storing the calculation expression data input by the expression input means for each input term, and an input expression storage means for storing the input expression storage means. Storage type calling means for sequentially calling and displaying arbitrary items from the calculation formula data, and calculation formula data input by the formula input means is called and displayed by the storage type calling means on the input formula storage means. An electronic computer, comprising: stored calculation formula data rewriting means for storing the calculation formula data subsequently.