JPH02105960A - small electronic calculator - Google Patents

Abstract

PURPOSE:To facilitate operation by storing a mathematical expression which is generated based upon a prescribed arithmetic mode corresponding to the arithmetic mode and performing mathematical expression arithmetic according to the arithmetic mode stored corresponding to the mathematical expression when the stored mathematical expression is executed. CONSTITUTION:The mathematical expression which is generated based upon the prescribed arithmetic mode is stored in a RAM 4 corresponding to the arithmetic mode as shown in areas 41 and 42, and when the stored mathematical expression is executed, the mathematical expression arithmetic is carried out based upon the arithmetic mode stored corresponding to the mathematical expression. Therefore, manual arithmetic mode specification which is required every time the stored mathematical expression is executed can be omitted. Consequently, the operation is facilitated and erroneous arithmetic and errors caused by an error in the specification of the arithmetic mode are eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a small electronic calculator capable of storing a plurality of mathematical formulas.

[Prior Art] Conventionally, small electronic calculators, such as scientific calculators, have four arithmetic operation modes, n-ary/fL calculation modes, standard deviation, regression calculation,
There are devices that can store a plurality of formulas created based on various calculation modes, such as Dog, RadSGra, and Fix. In such a calculator, when attempting to perform calculations based on these stored mathematical formulas, it is necessary to manually specify the calculation mode again.

[Problems to be Solved by the Invention] However, if the calculation mode is manually specified each time a mathematical formula is executed, not only is this operation cumbersome, but if the calculation mode is incorrectly specified,
This method had drawbacks that made it difficult to use, such as incorrect calculation results and errors.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a small-sized electronic calculator that is easy to operate, eliminates errors in mode specification, and has improved usability.

[Means for Solving the Problems] The present invention stores a mathematical formula created based on a predetermined calculation mode in correspondence with the calculation mode and the mathematical formula, and when executing these stored mathematical formulas, Mathematical calculations are performed based on the calculation mode stored.

[Effect] As a result, it is possible to eliminate the need to manually specify the calculation mode each time a stored formula is executed. This eliminates all miscalculations and errors.

C Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the circuit configuration of the same embodiment. In the figure, 1 is a key input section, and this key input section 1 is used for the above-mentioned four arithmetic operation modes, n-ary operation mode, standard deviation, regression calculation, and Dog.

One of various calculation modes such as Rad, Gra, Fix, etc.
It has an "operation mode designation" key 1a for designating one, an "execution" key 1b1, a "call" key 1c, a "cancellation" key 1d1, an "input mode" key 1eq, an "execution mode" key 1f, etc.

This key input data from the key input section 1 is given to the control section 2.

The control unit 2 is made up of a ROM, and stores programs for controlling each circuit in advance. In this case, the control unit 2
It gives control commands to the calculation RAM 3 and formula storage RAM 4, controls writing/reading of data based on address data, gives control commands to the calculation section 5, and controls the communication with the calculation RAM 3. A mathematical calculation is executed by exchanging data, and the display unit 6
I am trying to give display data to .

The calculation RAM 3 includes an A buffer 31, a B buffer 32, and a C buffer.
The buffer 33 and calculation mode flag area 34 are
It's happening. Here, the A buffer 31 stores an executed mathematical formula or an input mathematical formula, and is a calculation mode storage section 31a.
have. The B buffer 32 is a RAMJ for storing mathematical formulas.
The reference formula (the formula to be displayed on the display unit) is stored therein, and includes a calculation mode storage unit 32a. The C buffer 33 stores calculation results. In the calculation mode flag area 34, flags corresponding to a plurality of calculation modes are set to H, and a flag corresponding to a designated calculation mode is set.

The formula storage RAM 4 has a plurality of sets of a formula storage area 41 for storing input formulas and a mode storage area 42 for storing calculation modes corresponding to the input formulas.

Next, the operation of the embodiment configured as above will be explained.

First, in the input mode, when the "input mode" key 1e of the key input section 1 is operated, the flowchart shown in FIG. 2 is executed. In this case, in step A1 it is determined whether there is any key input. Here, this state is maintained while the determination is NO. From this state, specify the calculation mode with "
When you operate the "Calculation mode designation" key 1a, step A1
The answer is YES, and the process proceeds to step A2. Then, it is determined that it is the "calculation mode", and the process proceeds to step 83, where one of the plurality of calculation modes specified by the "calculation mode designation" key 1a is written into the calculation mode flag area 34 of the calculation RAM 3. It will be done.

Next, press the "numeric" key (not shown) or rs l nJ
Enter the formula using function keys such as s rXJ. In this case, when the first data of the formula is input, the answer is YES in step A1, and the process proceeds to step A2.

Then, it is determined that the data is "numeric value or function" data, and the process advances to step A4. In step A4,
Determine whether the input formula data corresponds to the first formula. Here, the answer is YES, so step A
5, the calculation mode flag written in the calculation mode flag area 34 is written to the calculation mode storage section 31a of the A buffer 31 of the calculation RAM 3, and then the process proceeds to step A.
Proceed to step 6, and the first formula data of the key-input formula is A.
The data is written to the buffer 31. Thereafter, if you continue to input mathematical data using the "numeric" key or function keys such as "sin" and "x", the operations of steps A1 to A6 will be repeated, and the mathematical data input by key will be A.
It will now be written to buffer 3.

Then, when you have finished entering data for the formula, click
When the "execute" key 1b is operated, it is determined in step A2 to "execute", and the process proceeds to step A7, where the formula written in the A buffer 3 and the calculation mode are stored in the formula storage RAM.
4 first formula storage area 41 and mode storage area 42
The information will be stored in accordance with the .

Hereinafter, mathematical formulas entered by key input through similar operations are stored in the mathematical formula storage area 41 and mode storage area 42 of the mathematical formula storage RAM 4 with the mathematical formulas and calculation modes corresponding to each other.

Next, in the case of execution mode, when the "execution mode" key 1f of the key input section 1 is operated, the flowchart shown in FIG. 3 is executed. In this case, in step B1, it is determined whether or not there is a key input. Here, N.

This state is maintained while the determination is being made. If the "call" key 1d is operated from this state, YES will be obtained in step B1, and the process will proceed to step B2.

Then, "call" is determined, and the process proceeds to step B3.
The contents of the first formula storage area 41 and mode storage area 42 of the formula storage RAM 4 are read out and written to the B buffer 32 of the calculation RAM 3.

From this state, the contents of the B buffer 32 are sent to the display unit 6 and displayed in step A4.

Next, press the "Execute" key 1b, and at step B1, press Y.
The result is S, and the process proceeds to step B2. If it is determined to be "executed" here, the process advances to step B5. Step B5
determines the buffer storing the display data. Here, since there is display data in the B buffer 32, the process advances to step B6, and the contents of the B buffer 32 are transferred to the A buffer 31.
will be moved to Then, the process proceeds to step B7, and the calculation mode of the calculation mode storage section 31a of the A buffer 31 is set to the control section 2.
In step B8, the mathematical expression is calculated based on the calculation mode at this time.

Then, in step B9, the calculation result is written to the C buffer 33, and in step BIO, the contents of the C buffer 33 are sent to the display section 6 and displayed.

Note that the formula entered from the key input section 1 is stored in the A buffer 3.
1 and is displayed on the display section 6 based on the data in the A buffer 31, if the "execute" key 1b is operated, it is determined in step B5 that there is display data in the A buffer 31. Therefore, immediately proceed to step B mentioned above.
7 and subsequent operations will now be executed. Also, "Run"
If there is display data in the C buffer 33 when the key 1b is operated, it is determined in step B5 that there is display data in the C buffer 33, and the process returns to step B1 to wait for key input.

Next, when you operate the "cancel" key 1d of the key input section 1,
YES in step B1, and the process proceeds to step B2. Then, if it is determined to be "cancelled" here, step B11
Proceed to. Step Bll determines the buffer storing the display data.

If it is determined that there is display data in the A buffer 31, the process proceeds to step B12, where the contents of the A buffer 31 are cleared, and then, in step 813, the display contents of the display section 6 are cleared. Further, in step B11,
When it is determined that the display data in the B buffer 32 is white,
The process proceeds to step 81.4, where the contents of the B buffer 32 are cleared, and then the process proceeds to step B15, where the data in the A buffer 31 is displayed on the display section 6. Further, in step Bll, if it is determined that the display data in the C buffer 33 is H, the process proceeds to step B16, and the C buffer 3
Clear the contents of 3, then proceed to step B15, and
The data in the buffer 31 is now displayed on the display section 6.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications without changing the gist.

[Intimidating effect] According to the present invention, a mathematical formula created based on a predetermined calculation mode is stored in correspondence with the calculation mode and the mathematical formula, and when these stored mathematical formulas are executed, a mathematical formula corresponding to the mathematical formula is stored. Since the formula calculation is performed based on the calculation mode stored in the memory, when executing the stored formula,
It is now possible to omit the manual specification of the calculation mode, simplifying the operation, and eliminating miscalculations and errors caused by incorrect specification of the calculation mode, resulting in significant improvements in usability. be able to.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the circuit configuration of an embodiment of the present invention, and FIGS. 2 and 3 are flowcharts for explaining the operation of the embodiment. 1... Key input section, 1a... "Calculation mode specification" key 1b... "Execution" key 1c... "Call" key 1
d..."Release" key 1e..."Input mode" key 1f...Execution mode" key 2...Control unit, 3...
・Arithmetic RAM 131...A buffer, 32...B
Buffer, 33...C buffer, 34...Calculation mode flag area, 4...RAM for formula storage, 41...
・Formula storage area, 42...Mode storage area, 5.
...Arithmetic section, 6...Display section. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] a calculation mode specifying means for specifying one of a plurality of calculation modes; a formula input means for inputting a mathematical formula corresponding to the calculation mode specified by the calculation mode specifying means; A storage means for storing a calculation mode in correspondence with a mathematical formula inputted from the mathematical formula input means, and a mathematical formula calculation based on the calculation mode stored in correspondence with the mathematical formula when executing the mathematical formula stored in the storage means. What is claimed is: 1. A small electronic calculator characterized by comprising a mathematical calculation execution means for performing the following.