JPH06168206A - Electronic computer - Google Patents

Abstract

PURPOSE:To express the square formula in a form according to mathmetical rules at the electronic computer provided with a square root calculating function. CONSTITUTION:When a square root key 12a at a key input part 12 and keys for numericals which come under the square root symbol are operated in the case of inputting the square root formula, a root flag F is set to a flag register 14a of a RAM 14, and the leading part of the square root symbol is displayed on a dot matrix display body (16a, for example,) at the front edge of a root range in a display part 15. At the same time, the numerical display at dot matrix display bodies 16b, 16c,... for each digit corresponding to the operation of the numerical keys is turned on simultaneously with bar display bodies 17b, 17c,... above the figure based on the set state of the root flag F after the leading part of the square root symbol is displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic computer having a square root calculation function.

[0002]

2. Description of the Related Art Conventionally, an electronic computer has a display unit having a dot-matrix structure divided into each digit, and a numeral or an operator associated with a mathematical expression or a calculation value input by a key, and
Characters such as mathematical symbols are divided and displayed for each digit.

[0003]

However, in the case of a display having a dot matrix structure in which each digit is divided, like the above-mentioned conventional electronic computer, independent characters can be displayed for each digit without any problem. However, especially when displaying a mathematical expression including a square root (route) symbol, the horizontal bar portion of the route symbol cannot be displayed continuously over the range of numbers over which the route is multiplied, so the range over which the route is multiplied The route symbol is displayed only in the front end portion of the display area for one digit, and subsequently, only the numbers on which the route is applied are displayed for each digit. For this reason, there is a problem that the route expression cannot be displayed in a format that complies with the rules of mathematics. The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic computer capable of expressing a root expression in a format in accordance with mathematical rules.

[0004]

That is, an electronic computer according to the present invention has a square root calculation function, and has a key input unit having at least numerical keys 0 to 9 and a square root key, and a predetermined digit number. A dot matrix display body, a bar display body which is arranged above the dot matrix display body in a rod shape over each digit, and operates by dividing corresponding to each digit, and after the operation of the square root key And a control means for turning on the bar display according to the operation of the numerical keys.

[0005]

In other words, after displaying the root symbol by operating the square root key, by displaying the numerical value for each digit according to the operation of the numerical keys and turning on the bar display on the upper part of the numerical value, the mathematical rule is followed. The route expression can be displayed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a small electronic computer, and the operation of the small electronic computer is controlled by a CPU 11. In addition to the key input unit 12, the CPU 13, the ROM 13, the RAM 14, and the display unit 15 are connected.

The key input section 12 has ten keys "0-
9 ", operator keys" +,-, ×, ÷ ", clear key" C ", all clear key" AC ", calculation execution key" = ", etc. A root (square root) key 12a operated when performing the calculation used and various function keys according to need of other calculation functions are provided. The ROM 13 stores a calculation control program and a display control program that control the control operation of the CPU 11.

The RAM 14 stores, as necessary, numerical values as numerical values, mathematical formula data, arithmetic result numerical data, etc., which are key-operated in accordance with the arithmetic control operation by the CPU 11. , Flag register 1 set in accordance with the operation of the root key 12a
4a is provided.

The display unit 15 has, for example, 10-digit dot matrix display members 16a, 16b, ... And a dot-shaped display unit 16a, 16b ,. The display unit 15 is provided with a bar display unit 17. The display unit 15 has a key input unit 12
Numerical values, mathematical data, operators, symbols, etc. corresponding to the key input operation by are displayed.

Here, the lighting operation of the bar display body 17 in the display section 15 is performed by the dot matrix display body 16 described above.
a, 16b, ... Are separately controlled corresponding to each digit, and, for example, when a route expression is input, a dot matrix display (for example, 16a) at the front end of the range covered by the route. The root symbol is displayed on the screen, and the numbers that sequentially cover the route range are displayed on the dot matrix display units 16b, 16c, ... of the subsequent digits, and simultaneously with this number display, the bar display units 17b, 17 above the numbers.
c, ... Are lit and displayed as a horizontal bar portion of the route symbol. Next, the display operation of the small electronic calculator having the above configuration will be described. FIG. 2 is a flow chart showing a key input display operation in the small electronic calculator. Figure 3
FIG. 6 is a diagram showing a root type key input display state in the small electronic computer. That is, first, when the small electronic computer is powered on, the flag register 14a provided in the RAM 14 is reset.

By operating the key input unit 12, for example, "1"
When “+” is input, the numerical value input determination process and the flag determination process are performed, and as shown in FIG.
In addition to being displayed in a (steps S1 to S3), the addition operator “+” is the second digit dot matrix through the numerical value input determination processing, the root key determination processing, the operator key determination processing, and the flag reset processing. It is displayed on the display body 16b (steps S1 → S4 to S6, S3).

Then, when the root key 12a is operated, a numerical value input determination process is performed, and a root key determination process is performed.
As shown in FIG. 3B, after the root key operation flag "1" is set in the flag register 14a in the RAM 14, the front end portion of the root symbol is displayed on the dot matrix display 16c at the third digit ( Steps S1 → S4 → S
7, S3).

When the user inputs the numerical value "2" or "3" applied to the above-mentioned route symbol, the numerical value input judgment process and the flag judgment process are performed, and as shown in FIGS. 3 (C) and 3 (D), four digits are entered. At the same time as the bar display bodies 17d and 17e of the fifth and fifth digits are sequentially turned on as the range covered by the route, the numbers "2" and "3" are the dot matrix display bodies 16d and 16e of the fourth and fifth digits. Is displayed in (Step S
1, S2 → S8, S3).

After that, the key input unit 12 is operated to
When "-" is input, the flag register 14a in the RAM 14 is reset through the numerical value input determination processing, the root key determination processing, the operator key determination processing, and
As shown in FIG. 3 (E), the subtraction operator “-” is displayed on the display unit 1.
It is displayed on the 6th digit dot matrix display 16f in 5 (steps S1 → S4 to S6, S3).

Therefore, according to the small-sized electronic computer having the above-mentioned configuration, when the route key 12a in the key input unit 12 and the numerical key for the route are operated when the route formula is input, the route flag F is set to the flag of the RAM 14. The route flag is set in the register 14a, the leading portion of the route symbol is displayed on the dot matrix display (eg 16a) at the front end of the route range in the display unit 15, and at the same time, the route flag F is set after the leading portion of the route symbol is displayed. Based on the state, the dot matrix display units 16b, 16c, ... For each digit corresponding to the operation of the numerical keys are displayed with numbers, and the bar display units 17b, 17 above the numbers are displayed.
Since c, ... Are turned on at the same time, it becomes possible to continuously display the horizontal bar portion of the route symbol corresponding to the numerical range over which the route is applied, and the route expression can be displayed in accordance with the mathematical rules.

[0016]

As described above, according to the present invention, a key input section having a square root calculation function, having at least numeric keys 0 to 9 and a square root key, and a dot matrix display having a predetermined number of digits are provided. , A bar display that is arranged in a bar shape over each digit at the top of this dot matrix display, and operates by dividing corresponding to each digit, and after operating the above square root key Accordingly, since the control means for turning on the bar display body is provided, it is possible to express the route expression in a format in accordance with the mathematical rules.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing a key input display operation in the small electronic calculator.

FIG. 3 is a diagram showing a root-type key input display state in the small electronic calculator.

[Explanation of symbols]

11 ... CPU, 12 ... Key input section, 12a ... Root key, 13 ... ROM, 14 ... RAM, 14a ... Flag register, 15 ... Display section, 16a, 16b, ... Dot matrix display body, 17 ... Bar display body.

Claims (1)

[Claims] 1. An electronic computer having a square root calculation function, a key input unit having at least numeric keys 0 to 9 and a square root key, a dot matrix display body having a predetermined number of digits, and an upper portion of the dot matrix display body. A bar display that is arranged in a bar shape over each digit and that operates separately by corresponding to each digit, and the bar indicator lights up in response to the operation of the numerical key after the operation of the square root key. An electronic calculator comprising: