JPH0512953U - Small electronic calculator - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a small electronic computer with an improved calculation method. [Constitution] In this invention, when the partial calculation range is designated by the cursor after setting the partial calculation mode, the range is stored in the memory 5
The data in the specified range is stored and displayed in a specific format. When the calculation is executed, the partial calculation is performed within a designated range in the calculation formula, and the partial calculation result is displayed by replacing the specified display data.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small electronic computer with an improved calculation method.

[0002]

[Prior Art]

 Conventional electronic calculators and other small electronic calculators display the formulas to be calculated in the order of input format on the screen, and then operate the calculation execution keys to execute the calculation for the entire inputted formula. Was adopted. For this reason, it is not possible to perform arithmetic processing when an answer for a specific arithmetic section is to be obtained and placed in the middle of an arithmetic expression, and the answer for that specific arithmetic section is calculated, and the answer for the entire arithmetic expression is obtained. In order to obtain, it was necessary to transform the arithmetic expression, execute the arithmetic operation only for a specific arithmetic unit, and then input the remaining arithmetic expression after the answer to perform the entire arithmetic operation.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above situation, and its purpose is to preliminarily calculate only one calculation unit of a calculation formula in a computer having a calculation processing unit that performs calculation in format order. It is to provide a small electronic computer that is capable of doing so.

[0004]

[Means for Solving the Problems]

 The small electronic calculator of the present invention comprises a key input means including a numeral key, a function key, a cursor key and an execution key, a storage means for storing the input calculation formula, and an arithmetic processing of the input calculation formula. In a small-sized electronic computer equipped with a calculation means for displaying and a display means for displaying the input calculation formula and the calculation processing result,

A partial calculation setting means for setting a partial calculation mode, a range specifying means for specifying a partial calculation range of an input calculation formula, a range display means for specifically displaying data in the specified range, and a calculation formula It is characterized by including partial calculation means for performing partial calculation in the specified range and replacement display means for replacing and displaying the partial calculation result with the specifically displayed data.

[0006]

[Action]

 With this configuration, the partial range of the input calculation formula is specified, and the partial calculation of the calculation formula within this range is enabled.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the hardware arrangement of an embodiment of the present invention. In the figure, reference numeral 1 denotes a key input section, which is not only numeral keys or function keys (not shown), but also a partial key 1a for setting a partial calculation mode, a cursor key 1b for specifying a position of partial calculation, and an EXE key for executing a calculation. 1c is provided, and this key input section 1 is connected to a control section 2 which controls each section of the apparatus.

The control unit 2 includes an input formula buffer 3 for temporarily storing the input calculation formula sent from the key input unit 3, a calculation unit 4 for processing the input calculation formula 4, and a partial calculation unit for the calculation formula. Pointer memory 5 for storing the start position (P1) and the end position (P2) 5, the display unit 6 for displaying the calculation formula input to the input formula buffer 3 and the calculation result processed by the calculation unit 4. It is directly or indirectly connected to a display control unit 7 for controlling the display unit 6 and a cursor control unit 8 for designating a required position of a calculation formula displayed on the display unit 6.

The control unit 2 also has a flag 2 a indicating that the partial calculation mode is designated by the key input unit 1 and a pointer 2 b for designating the position of the input calculation formula in the input formula buffer 3. I have it. The calculation operation of the computer of the embodiment thus configured will be described with reference to the flowchart shown in FIG. 2 and the display example of the calculation formula shown in FIG.

When the calculation process is designated, in step P1, a numeric key, a function key, or a data key operation waiting state of the EXE key 1c for executing the calculation process is entered. If the operated key is a numeric key or a function key data key, the process moves to step P2, and in this step P2, the input data is designated by the pointer 2b of the control unit 2 and the input type buffer 3 Is stored in the predetermined position of the flow, and the flow returns to step P 1. As for the input of a normal calculation formula, a required calculation formula is input by repeating these steps and displayed on the display unit 6 as shown in FIG. 3 (a).

If the key operated in step P1 is a key other than the numeric keys or function keys, that is, the partial key 1a, the cursor key 1b or the EXE key 1c, the process proceeds to step P3. In step P3, it is determined whether the EXE key 1c has been operated. If it is determined that the EXE key 1c has been operated, the process proceeds to step P4. At step P4, the state of the flag 2a of the control unit 2 is checked, and if "1" is not set, the partial operation is not performed normally. In the next step P5, the calculation formula input to the input formula buffer 3 is calculated by the calculation unit 4, and the result is displayed on the display unit 6, and the normal calculation is performed. The calculation process ends.

When performing the partial calculation, it is necessary to operate the partial key 1a to specify the partial calculation mode. This partial operation designation can be performed even while the calculation formula is being input, but in the description of this embodiment, a method of performing the partial calculation when the calculation formula as shown in FIG. 3 (a) is input will be described.

In the equation shown in FIG. 3A, the part on which the partial operation is performed is tentatively defined as “2 × (3 + 4) −5”. Therefore, the leading data of the partial operation is "2" and the trailing data is "5".

First, the partial key 1a of the key input unit 1 is operated to set the partial calculation mode. In the flow chart, through steps P1, P3 and P6, it is determined in step P7 that the partial key 1a has been pressed, and the process proceeds to step P8. At step P8, the flag 2a of the control unit 2 is set to "1". Stand up.

Next, the head data “2” is designated by the cursor. When the cursor key 1b is pressed, the process moves to step P6 via steps P1 and P3. In this step P6, it is determined that the cursor key 1b is operated, the process moves to step P9, and the cursor key 1b is moved in this step P9. By doing so, the position of the head data "2" of the partial operation displayed as shown in FIG. 3 (a) is specified.

When the position of the head data “2” is designated by the cursor, the EXE key 1c is pressed to store this position in [P1] of the pointer memory 5. By this operation, the flow goes to step P4 through steps P1 and P3. At step P4, "1" has already been set in the flag 2a, so the routine proceeds to the next step P10.

In step P10, the presence or absence of data in [P1] of the pointer memory 5 is checked. However, since no data has been stored yet, the process moves to step P11, and in this step P11, the position of the head data “2” The pointer data of the pointer 2b corresponding to is referred to and this data is stored in [P1] of the pointer memory 5.

Next, the position of the tail data “5” is stored in [P2] of the pointer memory 5. This operation is the same as in the case of the head data “2”. In the flowchart, since the position of the head data "2" has already been stored in [P1] of the pointer memory 5, the process moves from step P10 to step P12, and at step P13, the tail data "5" is stored. The position is stored in [P2] of the pointer memory 5.

When the position data of the head data and the position data of the tail data are stored in the pointer memory 5, respectively, in step P14, the range of the partial calculation is shown. Therefore, as shown by the shaded area in FIG. Is highlighted.

Next, when the execute key 1c, which is the execution key, is pressed, the partial calculation of the designated range is executed in step P15 through steps P1, P3, P4, P10 and P12. Then, as shown in FIG. 3 (c), the range of the partial operation of the displayed input expression is replaced with the answer and displayed. Further, in the next step P16, the flag 2a is reset, and the partial operation processing is ended.

After that, it is possible to input the following formula, or, if the EXE key 1c is pressed again, the calculation process of the whole inputted calculation formula is executed through steps P1, P3, P4 and P5. To be done.

In the operation of the above-described embodiment, the method of first operating the partial key 1a to set the partial operation mode and then designating the start data of the partial operation with the cursor has been described. The order may be reversed. The present invention is not limited to the above embodiment, and can be modified and implemented within the scope not changing the gist.

[0023]

[Effect of the device]

 According to this invention, the result for the specific operation part in the input calculation formula is obtained separately from the result for the whole calculation formula, so when you want to obtain both the result of the whole formula and the result of partial calculation, Calculation operation becomes easy. Even if the calculation formula is long, the whole formula can be shortened by performing the partial calculation process.

[Brief description of drawings]

FIG. 1 is a block diagram showing a hardware configuration of an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a calculation processing operation of the same embodiment.

FIG. 3 is a display example when an example of a calculation formula is input in the embodiment.

[Explanation of symbols]

1 ... Key input section 1a ... Partial key 1b ... Cursor key 1
c ... EXE key 2 ... control section 2a ... flag 2
b ... pointer 3 ... input buffer 4 ... operation unit 5
...... Pointer memory 6 …… Display unit 7 …… Display control unit 8
...... Cursor control section.

Claims (1)

[Scope of utility model registration request] 1. A key input means including a numeric key, a function key, a cursor key and an execution key, a storage means for storing an input calculation formula, a calculation means for arithmetically processing the input calculation formula, and an input. In a small electronic computer having a display unit for displaying the calculated calculation formula and the calculation processing result, a partial calculation setting unit for setting a partial calculation mode and a range specifying unit for specifying a partial calculation range of the input calculation formula. When,
Range display means for specifically displaying the data in the specified range, partial calculation means for partially calculating the calculation formula in the specified range, and replacement display means for displaying the partial calculation result by replacing it with the specifically displayed data. And a small electronic calculator.