JPH058657U - Small computer - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a small-sized electronic computer having a function of storing a formula (LRN professional function) in the process of formula calculation. [Structure] Key input means 1 including a function key 1c, program writing means 1a and 2, and program storage means 4
And a first display means 5a for displaying an input numerical value or a numerical value which has been subjected to calculation processing. The display unit 5b is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small electronic computer having a function (LRN pro function) of storing a mathematical formula in the process of mathematical formula calculation.

[0002]

[Prior Art]

 The calculation processing method of a small electronic calculator, which is usually called a calculator, is a "complete formula-based method" in which each time a user inputs a calculation formula using a key, the calculation is executed based on the formula up to that point and the input numerical value. There are two known methods, the “formatting method”, in which the user inputs the formulas and numerical values in the same order as they were written on the paper, and finally the operation is performed by pressing the Enter key. ing. The latter method is convenient for small computers with a dot matrix display, and is particularly suitable for program calculation.

Calculators that employ the former “complete formula-based method” often use a “day” -shaped 7-segment display as the main display unit. In this display method, there is no particular problem when displaying numbers, but it is not possible to display symbols such as function symbols "SIN" "COS" or operation symbols "+" "-". Therefore, it was not possible to adopt the “as-formatted” calculation method when using 7-day-shaped segments on the display. However, this display method does not hinder normal calculation, and it has many advantages, and most calculators use the "day" -shaped 7-segment display method. It is based on the formula. However, the “formatted method” has many advantages, and in order to take advantage of this advantage, there is also known a calculator having an LRN professional function equipped with a function capable of forming a simple program by this display method.

However, since the calculator itself having the LRN professional function has a “complete formula-based method”, the calculator program is executed after key-inputting the calculator and numerical values like a normal program calculator. Instead of using the Execute key operation to set them all at once, after specifying the LRN mode, enter the formulas in the order of the formulas, and execute the calculation each time. Then, when inputting a parameter, operate the [ENT] key, enter the numerical value of the required parameter, and finally operate [=] to obtain the answer to the calculation formula. By this operation, the calculation formulas other than the numerical values of the parameters are stored in the program memory.

When performing a program calculation using a stored calculation formula, after selecting a necessary calculation formula by designating a RUN mode, a predetermined execution key, for example, the [RUN] key is operated to change the calculation formula. The calculation is executed by inputting the numerical values of the parameters at the prescribed positions.

In such a calculator using the “day” -shaped 7-segment display method, when inputting a program, arithmetic commands such as “×” “÷” and “SIN” “COS” Since the function symbol cannot be displayed, the progress of the input operation cannot be confirmed during the process of inputting the calculation formula, and the input position of the parameter is difficult to understand when performing the program calculation using the stored calculation formula. There was also.

[0007]

[Problems to be solved by the device]

 The present invention has been made to solve the above-mentioned problem. Even if the main display is a 7-segment display, the input program data can be confirmed and the input position of the parameter can also be confirmed. It is an object of the present invention to provide a small-sized computer equipped with the LRN professional function.

[0008]

[Means for Solving the Problems]

 The small electronic computer of the present invention comprises a key input means including a function key, a program writing means, a program storing means, and a first display means for displaying an input numerical value or a calculated numerical value. The small-sized computer is characterized by having a second display means for sequentially displaying each operation of the key input means.

[0009]

[Action]

 With this configuration, the input key data can be sequentially displayed and confirmed on the second display means every time the key input means is operated.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block circuit diagram showing the hardware configuration and memory configuration of this embodiment.

In the figure, reference numeral 1 is a key input section, which is an LRN mode key 1a for designating an LRN program, a numerical key 1b for a numerical value, a function key 1c such as "SIN" and "COS", and an arithmetic operation key for operation. 1d, an ENT key 1e for inputting parameters, an execution key 1f, and a RUN mode key 1g for designating a RUN mode are provided, and this key input unit 1 is connected to a control unit 2 for controlling each unit of the computer.

The control unit 2 includes a register 3 for temporarily storing data input from the key input unit 1 and a calculation processing result, a memory 4 for storing a program calculation formula, and data input from the key input unit 1. Is connected to the display unit 5 for displaying the calculation processing result, and for indicating that the next data is the numerical value of the parameter when the parameter is input to the control unit 5 and the stored calculation formula. Thus, when executing the program calculation formula, an ENT flag 2a for setting a flag indicating a parameter input enabled state is provided.

The display unit 5 is a segment display unit 5a formed of 7 segments in a “day” shape, for example, which is composed of 8 digits, and is used to display function symbols and operation symbols. A dot display section 5b formed of 8 × horizontal 15 dots, an LRN symbol 5c indicating the LRN professional mode, an ENT symbol 5d indicating a parameter input waiting state, and a RUN symbol 5e indicating the calculation program execution mode are provided. I have it. The operation of inputting the LRN program of the embodiment thus constructed will be described with reference to the flow chart shown in FIG. 2 and the display example shown in FIG.

As a calculation program of this embodiment, a case will be described where the surface area S of a regular octahedron whose one side is a is calculated. Incidentally, the calculation formula for obtaining the surface area S of a regular octahedron can be expressed by the following formula. S = 2/3 ^1/2 ・ A ²

In the flow of FIG. 2, when the LRN mode key 1a of the key input unit 1 is operated in step A1, the LRN mode is designated. At this time, the LRN symbol 5c is lit on the display unit 5 as shown in FIG. 3 (1), and "0" is displayed on the segment display unit 5a. Further, in this initial step, the ENT flag 2a of the control unit 2 is reset to "0".

After that, when "2" is input from the numerical key 1b in step A2, the type of the operated key is judged in step A3. In this case, the numerical key 1b is used. At step A4, the key data “2” is stored in the register 3 via the control unit 2, and this data “2” is displayed on the segment display unit 5a at step A5 as shown in FIG. 3 (2). To be done.

In the next step A6, a judgment process for selecting a processing route is performed by looking at the state of the ENT flag 2a. Since the ENT flag 2a is in the reset state of “0” at this point, Then, in step A7, the key data "2" is written in the first No1 address of the memory 4. Further, this data "2" is displayed in the dot display portion 5b in step A8 as shown in FIG. 3 (2).

Next, when the multiplication key “x” of the operation key 1d is pressed, the process proceeds to step A9 by the determination at step A3, and the state of the ENT flag 2a is determined at this step A9. Since "1" is not set, the process further proceeds to the next step A10. This step A10 is a step of executing the calculation process, but since the key input data at this point is only "2", the calculation process is not executed and the process proceeds to step A11 to store the key data "x" in the memory 3 Write to No. 2 address. The data "x" is displayed in the dot display portion 5b in step A12 as shown in FIG. 3 (3).

Further, when "3" is keyed in, the process proceeds to the routine of step A4, the key data "3" is written in the No. 3 address of the memory 3, and the segment display section 5a and the dot display area are displayed as shown in FIG. 3 (4). It is displayed on the display unit 5b.

Next, when the "root" key of the function key 1c is pressed, the square root of "3" is calculated and obtained in step A10, and as shown in FIG. 3 (5), the segment display portion 5a and the dot display portion are displayed. Numerical values and route symbols are displayed on 5b.

Next, when the multiplication key "x" of the operation key 1d is pressed, in step A10, the data input so far is calculated, and the segment display portion 5a and the dot display area are displayed as shown in FIG. 3 (6). The display unit 5b displays the calculation result and the "x" symbol, respectively.

Next, the parameter a is input. In the case of the parameter value input, the ENT key 1e is pressed before the value input. By this operation, it is determined in step A3 that the ENT key 1e has been pressed, and the process proceeds to step A13 to write "1" in the ENT flag 2a. Then, in the next step A14, the ENT symbol 5d of the display unit 5 is turned on, and in the step A15, the key data "ENT" is written in the memory 4.

After that, the numerical value of the parameter, for example, “10” is input by the numerical key 1b. Since the operation key at this time is the numerical key 1b, the process proceeds to the routine of step A4, but since "1" is set in the ENT flag 2a, step A6 is YES and this data "10" is stored in the memory 3 of the program. Is not written. Also, it is not displayed on the dot display portion 5b. Therefore, as shown in FIG. 3 (7), the display unit 5 displays the numerical value "10" on the segment display unit 5a, and the ENT symbol 5d indicating that this numerical value is a parameter lights up.

Further, in order to obtain the square value of the numerical value “10” of the parameter a, “X ² When the "" key is pressed, the process proceeds from step A9 to step A16, and the ENT flag 2a is reset to "0" in this step A16. After this, in step A10, the square calculation for the numerical value "10" is performed, and the result and the operated key "X ² " are calculated. Is displayed as shown in FIG. 3 (8).

Finally, when the execution key 1f “=” is pressed, the execution of the program for obtaining the surface area S of the regular octahedron and the writing process of the calculation formula are completed through the processes of steps A9, A10, A11 and A12.

As described above, the program 4 stores the program data in the execution order as shown in FIG. However, the numerical value of the parameter is not stored in this memory 4, but "ENT" indicating that this position is the numerical value input position of the parameter is stored.

After that, by pressing the RUN mode key 1g for designating the RUN mode, it is possible to perform program calculation for other parameter values. At this time, the program data written in the program memory 3 is read out step by step, and when the numerical value of the parameter a is input, the ENT symbol 5d of the display unit 5 is turned on, so the user turns on this symbol. Confirm and input the numerical value of the parameter a. The present invention is not limited to the above embodiment, and can be modified and implemented within the scope not changing the gist.

[0028]

[Effect of the device]

 According to this invention, in addition to the main display section for displaying numerical values, another display means for displaying operation commands and function commands is provided, so that the input operation of the LRN program and the program calculation using the stored program are performed. It is possible to facilitate the operation of and reduce operation mistakes.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing a hardware configuration and a memory configuration according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a program input method according to this embodiment.

FIG. 3 is a display example when a program is input according to the flowchart of FIG.

[Explanation of symbols]

1 ... Key input section 1a ... LRN mode key 1
b ... Numerical key 1c ... Function key 1d ... Calculation key 1
e ... ENT key 1f ... Execution key 1g ... RUN mode key 2 ... Control section 2a ... ENT flag 3 ... Register 4 ... Memory 5 ... Display section 5a ... Segment display section 5
b ... Dot display portion 5c ... LRN symbol 5d ... RUN symbol 5
e ... ENT symbol

Claims (1)

[Claims for utility model registration] 1. Key display means including function keys, program writing means, program storing means, and first display for displaying input numerical values or calculated numerical values. And a second display means for sequentially displaying key data for each operation of the key input means.