JPH0764924A - Electronic equipment - Google Patents

Abstract

PURPOSE:To provide an electronic equipment capable of preserving plural pairs of variable values to one formula. CONSTITUTION:This system is composed of a CPU 1 for controlling arithmetic operations and display, etc., a display device 2 for displaying input information, arithmetic results and a menu, etc., a keyboard 3 constituted of alphabets, numerals, [=], [+], [-], [*], [/], cursors, [Enter], [MENU], [SOLVE] and [EQTN], etc., a program ROM 4 for storing a program for performing menu display and the evaluation and arithmetic operation of the formula and a RAM memory 5 for storing data provided with an area utilized for storing the formula and variables and the arithmetic operations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic devices capable of storing mathematical formulas such as scientific calculators and pocket computers.

[0002]

5 and 6 are schematic diagrams of a conventional memory. Conventionally, as shown in FIG. 5, only the formula can be saved, or as shown in FIG. 6, only the formula and the numerical value of one set of variables can be saved, and a plurality of sets of variable values can be saved for one formula. In that case, it was necessary to save the same formula as many as the number of variables to be saved.

[0003]

Therefore, in the case where various numerical values are stored in one expression and the numerical values are used according to the purpose, a large number of the same expressions will exist and the memory The usage rate was getting worse. Furthermore, in order to select the same expression from among many expressions, it is necessary to distinguish it by a title or the like when registering the expression.

Therefore, an object of the present invention is to provide an electronic device capable of storing a plurality of sets of variable values for one expression.

[0005]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above problems. In the invention of claim 1, input means for inputting numerical values of formulas and variables, and a registered name are input. A registered name input means, a first instructing means for instructing registration of numerical values of expressions and variables, a second instructing means for instructing registration of only numerical values of variables, and a desired expression among registered expressions. In response to the selecting means for selecting and the first instructing means, the expression input from the input means and the numerical values of the variables of the expression are added to the registration name input by the registration name input means. At the same time as registering, in response to the second instructing means, the numerical value of the variable inputted from the inputting means is selected by the selecting means with the registered name inputted by the registered name inputting means. And a registration means for registering in correspondence with the expression.

[0006]

In the present invention, in response to the first instructing means, the expression input from the input means and the numerical values of the variables of the expression are registered with the registered name input by the registered name inputting means. With
In response to the second instructing means, the numerical value of the variable inputted from the input means is added with the registered name inputted by the registered name input means and registered in correspondence with the expression selected by the selecting means. Is.

[0007]

1 is a system block diagram of the present invention.
2 and 3 are views showing display examples of the present invention. FIG. 4 is a schematic diagram of the memory of the present invention. Hereinafter, the present invention will be described in detail with reference to the drawings.

In FIG. 1, the system of the present invention comprises a CPU 1 for controlling calculation and display, a display device 2 for displaying input information, calculation results, menus, etc., and an alphabet for inputting variable names and titles. (A ...
z), numbers (0, 1 ... 9) for entering numbers,
[=], [+], [-], [*], For entering expressions
[/], A cursor for selecting an expression or menu, [Enter] for recognizing completion of input, etc., [MENU] for calling a menu screen, and instructing to find the root of an unknown variable from an expression [SOLVE ], A keyboard 3 composed of keys such as [EQTN] for calling an expression input screen from a menu screen, a program ROM 4 storing a program for performing menu display, expression evaluation, and calculation, and expressions and variables A RAM memory-5 for storing data, which has an area for storing such information and for use in calculations.

The input, registration, and calling of the formulas and numerical values according to the present invention will be described below with reference to the display examples shown in FIGS. FIG. 2A is an initial screen for inputting an expression.
It is possible to enter an expression in the display state of this screen.
Then, when the expression “a = b + c” is input from the keyboard 3, the screen display of FIG. In this state, press the [Enter] key on the keyboard 3 to display the expression "a = b +
When the input of “c” is completed, the numerical value input screen for each variable in FIG. Here, the numerical value “10” is assigned to the variable “a”
In order to input the numerical value “20” into the variable “b”, after inputting “10” from the keyboard 3, press the [Enter] key, then enter “20” and press the [Enter] key. . After that, the cursor is moved to the position of the variable "c" by the cursor key ((d) in FIG. 2). And
When the [SOLVE] key is pressed, the root is obtained using the variable “c” as an unknown variable. Then, the calculated calculation result “c
= -10 "is displayed as shown in FIG. Here, when the [Enter] key is pressed, a numerical value input screen for each variable is displayed as shown in FIG.

However, at present, the entered expression "a = b +
c ”and the numerical values of each variable“ a = 10 ”,“ b = 20 ”,
Since "c = -10" has not been registered,
Press the [MENU] key to display the initial screen ((g) in Fig. 2)
Return to. Here, the function of each menu will be described. "LOAD" reads the numerical values of expressions and variables from memory. “SAVE” writes the numerical values of expressions and variables to memory. “VSAVE” writes only the numerical value of the variable to the memory. “DEL” deletes the numerical values of expressions and variables written in memory. Conventionally, there is no menu such as “VSAVE”.

Since the entered expressions and the numerical values of variables are registered now, if "SAVE" is selected from the menu with the up and down cursor keys and the [Enter] key is pressed ((h) in FIG. 2). , A registration name input instruction screen is displayed ((i) in FIG. 2), for example, when the registration name “ABC” is input from the keyboard 3 and the [Enter] key is pressed, the expression “a = b + c” and each variable are displayed. Value of "a = 10",
“B = 20” and “c = −10” are registered in the memory (RAM memory 5 for data storage). After registration, the screen shown in FIG.

To confirm the registered data, press the [MENU] key to display the initial screen of the menu, and select "LOAD" with the up and down cursor keys to register the expression name as shown in FIG. The display screen is displayed. At the top of the screen, there is a triangle pointing to the right that there is a variable value registration screen, and by pressing the right cursor key, (b) in FIG.
The registered name of such variable value is displayed. From here, you can return to the expression registration name display screen with the left cursor key.

If different values are assigned to the variables of the same formula ,. When the [Enter] key is operated after selecting the registered name of the desired expression with the cursor keys on the screen of FIG. 3A, the screen of FIG. 2B is displayed, and when the [Enter] key is operated in this state. The numerical value of the first registered variable among the numerical values for each variable of the desired expression is displayed in the state of (f) of FIG. Enter new values in this state. The input of the numerical value of each variable is the same as the above. For example, the variable "a" has a numerical value "1"
After inputting the numerical value "2" into the variable "b", [SOLVE]
When the key is pressed, the root "-1" of the variable "c" is found,
“A = 1, b = 2, c = −1” is displayed in the state of FIG. After that, if you press the [MENU] key and select "VSAVE" from the initial screen, the registered name display screen of the registered expression will appear, so you can select which expression you want to register from here. When the [Enter] key is operated after selecting the registered name with the up and down cursor keys ((c) of FIG. 3), the registered name of the input variable value is requested ((d) of FIG. 3). Therefore, after inputting the registered name "DEF", the [Enter] key is operated.

The registered variable value can be confirmed by operating the [MENU] key and selecting "LOAD" with the cursor keys, as shown in FIG. 3 (e). Here, it is displayed that there is an expression registration name and a variable value registration screen. When the right cursor key is operated, the registered name of the variable is displayed as shown in FIG. Therefore, the registered variable value can be called by pressing the [Enter] key after selecting a desired registered name with the up and down cursor keys.

The above is an example in which the saving can be easily performed in the menu format, but as another means, an input method of saving the numerical value of the variable with one key can be considered.

In the schematic diagram of the memory of FIG. 4, the registration name "AB
For the expression “a = b + c” of “C”, the variables “a = 10, b = 20, c = −10” of the registered name “ABC” and the registered name “DE
The variable “a = 1, b = 2, c = −1” of “F” is registered, and the variable “a = 3” of the registered name “GHI” is added to the expression “a * b = c” of the registered name “GHI”. , B = 2, c = 6 ”are registered. In this storage format, the registered name of the expression is first, and the registered name of the variable is below it.

[0017]

According to the present invention, in response to the first instructing means, the expression input from the input means and the numerical values of the variables of the expression are added to the registered name input by the registered name input means. Then, in response to the second instructing means, the numerical value of the variable input from the inputting means is added to the registered name input by the registered name inputting means and added to the expression selected by the selecting means. Since the correspondence is registered, a plurality of sets of variable values can be stored for one expression, and the following effects can be expected.

Each constant is defined in one formula,
By changing only some of the numerical values for various purposes, the procedure for obtaining the required numerical values can be shortened.

Until now, it was mainly possible to store equations, but the present invention has enabled new usages such as collecting, storing, and processing numerical values.

[Brief description of drawings]

FIG. 1 is a system block diagram of the present invention.

FIG. 2 is a diagram showing a display example of the present invention.

FIG. 3 is a diagram showing a display example of the present invention.

FIG. 4 is a schematic diagram of a memory of the present invention.

FIG. 5 is a schematic diagram of a conventional memory.

FIG. 6 is a schematic diagram of a conventional memory.

[Explanation of symbols]

 1 CPU 2 display device 3 keyboard 4 program ROM 5 RAM memory for data storage-

Claims (1)

[Claims] 1. An input means for inputting numerical values of expressions and variables, a registered name inputting means for inputting registered names, a first instructing means for instructing registration of numerical values of expressions and variables, and only numerical values of variables. Second instructing means for instructing registration, selecting means for selecting a desired expression from the registered expressions, an expression input from the input means in response to the first instructing means, and the expression The numerical value of each variable is registered with the registration name input by the registration name input means, and the second
In response to the instruction means, the numerical value of the variable input from the input means is added with the registration name input by the registration name input means and registered in correspondence with the expression selected by the selection means. An electronic device comprising: a registration unit.