JPS6210828Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an exponent information processing device that can effectively correct the number of the exponent part in an electronic desktop calculator or the like having a mantissa part and an exponent part.

Conventionally, the exponent part (for example, 2 digits) has been corrected by rotating the exponent part, that is, by shifting the exponent part each time the exponent part is inserted, and sequentially inserting the digits while erasing overflowing digits. Therefore, in order to correct the exponent part, it is necessary to re-enter the two-digit number, and the content that was incorrectly entered before the correction is displayed as is, so the display may be misunderstood. It had the disadvantage of being easy.

That is, conventionally, for example, if you wanted to input 1×10 ²³ , the key operations and display contents were as shown in Figure 3.
After setting the exponent mode (1→F) using the Exp key, enter the number. However, if you enter an incorrect value (for example, "4") in the exponent part, be sure to correct the exponent part. It is necessary to enter two-digit numbers such as "2" and "3", which makes the key operation complicated, and because the number "4" that was incorrectly entered previously is displayed, there is a risk of misinterpretation of the display. There were some problems, such as:

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional method.In particular, it is possible to use the shift (□→) key used for correcting the mantissa part, and when an incorrect value is entered in the exponent part. Then, use the shift key to shift only the exponent part (for example, right shift),
It is an object of the present invention to provide an exponent information processing device having an exponent part correction method that restores the state before an incorrect number was entered and makes it possible to input a correct number again.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a circuit block diagram of an example of the device of the present invention, and in the figure, the CPU is a central processing unit,
A display section (display) has a mantissa display section (X ₁ to Xi) and a two-digit exponent display section (x ₁ , x ₂ ), and a group of keys (KEY) for controlling numerical values and shift □→ keys are connected. ing. Furthermore, the CPU has RAM as memory for key input, calculations, etc.
Algorithms for general calculator functions are stored in ROM.

FIG. 2 is a flow chart for realizing the present invention, and this flow is stored in the ROM. Here, F=0 is the mantissa mode and F=1 is the exponent mode.

Furthermore, FIG. 4 is a diagram showing the correction contents of the exponent part of the present invention in comparison with the conventional method (FIG. 3) when it is desired to input 1×10 ²³ .

An example of a case where it is desired to set a number of 1×10 ²³ in the device of the present invention will be described below.

First, use the Exp key (see Figure 1) to set the index.
Provided in KEY group. ) to perform 1→F (exponential mode setting), and then perform number setting. At this time, the exponent part is shifted to the left, and the entered contents are the exponent part x ₁
(See Figure 1). In this example, the number "2" is displayed at the _x1 position of the exponent part. Next, if the second number "4" is entered by mistake, the previously entered number "2" will be displayed at the position of the exponent part x ₂ due to the left shift operation of the exponent part, and the second number The contents are displayed in the exponent x ₁ position. Fourth
In the calculation example shown in the figure, "4" is displayed at the _x1 position. The content placed in the second position is an incorrect input, and the shift □→ key is operated to correct it. When the □→ key is operated, in the flowchart of Figure 2, F = 1 (exponent mode), so
The exponent part is shifted to the right, and the number "2" that was in the x ₂ position is displayed in the x ₁ position, and the number "4" that was in the x ₁ position disappears. As a result, the incorrectly entered number "4" disappears, and then, for example, by entering the correct number "3", "2" is displayed at the position of the index display section x ₂ , and "2" is displayed at the position of x ₁ . 3" will be displayed, and you can use the shift key that is already prepared for correcting the mantissa position, for example, without misinterpreting the display or inputting a new two-digit number. Corrections can be made. Therefore, when making a correction, only the erroneous numerical value (one digit) needs to be input, and since the contents of the erroneously entered number are not displayed by the shift (□→) key, there is no possibility of misidentification.

As described in detail above, according to the present invention, when the mantissa mode is set, the contents placed in the mantissa part are corrected by operating the shift key, and when the exponent mode is set, the contents placed in the mantissa part are corrected. So,
By operating the shift key, the contents placed in the exponent part are corrected without changing the contents placed in the mantissa part, so correction of the mantissa part and exponent part in each mode can be performed using the same key operation. In addition, in the exponential mode, only the contents of the digits in the exponent part are corrected, and in this case, the contents of the digits in the mantissa part are not corrected, ensuring correction of input errors in numerical data displayed as exponents. can be done.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of an embodiment of the device of the present invention, FIG. 2 is a flowchart for realizing the same device, and FIG. 3 is a diagram for explaining the contents of the conventional exponent part correction. FIG. 4 is a diagram for explaining the contents of the correction of the exponent part according to the present invention. In the figure, CPU: central processing unit, KEY: key input section, DISP: display section, ROM: read-only
Memory, RAM: Random access memory.

Claims (1)

[Scope of utility model registration request] a display section having a mantissa display section and an exponent display section;
a mode key for setting a mantissa mode in which the contents of a digit are displayed in the mantissa display section, or an exponent mode in which the digit contents of the mantissa and the exponent are displayed in the mantissa display and the exponent display, respectively; , a shift key for shifting the contents of the set number, a mode determining means, and when the shift key is operated,
When the mode determining means determines that the mantissa mode is set, the content of the digit displayed in the mantissa display section is shifted and displayed, and the mode determining means determines that the exponent mode is set. Then, the exponent information processing device is characterized by comprising means for shifting and displaying the contents of the digits displayed on the exponent display section while leaving the contents of the digits displayed on the mantissa display section unchanged.