JPH021627Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a small electronic calculator that performs special operations such as determining the composition ratio of each input data based on input numerical data and its cumulative value.

2. Description of the Related Art Conventionally, small electronic calculators have been devised that are capable of calculating special operations such as composition ratios or rates of change based on a plurality of numerical data with a single key operation. In order to execute these special operations, it was necessary to store numerical data in advance. Conventionally, in order to store this numerical data, one has to operate a key or mode switch in advance that specifies that all subsequent numerical data will be stored, or change the normal key input operation procedure. This required special operations such as However, having to perform such a special operation every time a special calculation is performed is extremely troublesome and can lead to key operation errors.

This invention was made based on the above circumstances, and its purpose is to use a small electronic device with special calculation functions that can easily perform special calculations such as composition ratio calculations using normal calculation operations. The purpose is to provide a calculator.

An embodiment of this invention is shown below in Figures 1 to 5.
This will be explained based on the diagram. FIG. 1 shows a schematic system configuration diagram of a small electronic calculator with a printer. Reference numeral 1 is an input section, and this input section 1 includes a number key group 2,
In addition to being equipped with 3 function keys,
A composition ratio key 4 for determining the composition ratio of input numeric data and a change rate key 5 for determining the rate of change of the input data are provided. The operation signal of this input section 1 is inputted to the input buffer 6 via line _l1 .

On the other hand, reference numeral 7 is a ROM, in which various microinstructions are stored. This ROM 7 outputs an address signal to the addressing circuit 8 via line _l2 , and outputs an operation code and a next address signal specifying the next address of the ROM 7 to the control circuit 9 via line _l3 . Then, the next address signal is sent from the control circuit 9 to the line
It is input to ROM7 via _l4 and addresses the next microinstruction.

The address designation circuit 8 designates the address of the RAM 10, and outputs a completion signal to the control circuit 9 via line _l5 when the address designation is completed. Furthermore, this addressing circuit 8 includes a RAM.
The data read out from index.10 is input via line _l6 , the so-called index.10. Performs addressing.

The RAM 10 includes X, T, n, N, A ₀ to A _o
The RAM 10 is provided with registers, a flag area F, etc., and the data read from the RAM 10 is output to the arithmetic circuit 11 as well as to the display section 12 and the printing section 13. The arithmetic circuit 11 performs various specified arithmetic operations, and the results of these arithmetic operations are sent to the line.
It is input to RAM10 via _l7 . The display section 12 displays input data, and the printing section 13 prints the input data on recording paper.

The control circuit 9 decodes the input operation code and outputs a designation signal for specifying addition or subtraction via line _l8 to the arithmetic circuit 11, and from this arithmetic circuit 11 via line _l9 . The next address is changed according to the input data and the presence or absence of a carry. In addition, the control circuit 9
An R/W signal is output to the RAM ₁₀ via line l10, and a signal specifying count up or count down is output to the address counter in the addressing circuit 8 via line _l11 . Furthermore, the control circuit 9
outputs a read signal to input buffer 6 via line l ₁₂ , and reads the data in input buffer 6.
Send to RAM10.

Next, the operation of this invention will be explained. When you operate the addition key after entering the specified numerical data,
Processing according to the flow shown in FIG. 2 is executed. That is, in the execution of step _S1 , the flag area F
A judgment is made as to whether "0" or "1" is stored in , and if "1" is stored, the addition key It is assumed that this is not being operated, and the process moves to step _S2 . In the execution of step _S2 , "0" is written in the flag area F.
Next, the process moves to step _S3 , and _A0 of RAM10 is executed.
~A "0" is written to the n register of the RAM 10 where index data specifying the address of the _n register is stored. Next, the process moves to step _S4 , where "0" is written to the T register in which the cumulative value of the input numerical data is stored, and then the process moves to step _S5 . If "0" is stored in the flag area F in step _S1 , it is determined that the addition key has been operated at least once after the total key has been operated, and the process moves to step _S5 . In the execution of step _S5 , the numerical data stored in the X register of the RAM 10 is transferred to the display section 12 and the printing section 13, and is displayed on the display section 12 and printed on the storage paper by the printing section 13. Next, the process moves to step _S6 , where the numerical data of the X register and the contents of the T register are added together, and a cumulative operation is performed in which the result of this addition is written into the T register. Next, the process moves to step _S7 , where the numerical data in the X register is transferred to the _Ao register specified by the contents of the n register. Next, the process moves to step _S8 , and "0" is written to the X register. Next, the process moves to step _S9 , where "1" is added to the contents of the n register and the consolation index data is updated.

For example, when the numerical data "20" is entered and the addition gear is operated, steps S ₁ to _{S 9} are sequentially executed, and "20" is written on the recording paper as shown in FIG.
+" is printed. Next, the numerical data “30”,
When "40" and "50" are inputted sequentially using the addition key, steps _S1 , _S5 to _S9 are sequentially executed, and the numerical data "30", "40", and "50" are sequentially printed on the recording paper. Ru. Next, when the total key is operated, processing according to the flow shown in FIG. 4 is executed.

That is, in executing step _S11 , "1" is written in the flag area F, indicating the operation of the total key. Next, the process moves to step _S12 , and the index data "3" stored in the n register is
It is transferred to the N register of RAM10. Next, the process moves to step _S13 , where "0" is written to the n register. Next, proceed to step _S14 ,
The total data "140" stored in the T register is transferred to the display section 12 and the printing section 13, where it is displayed and printed on the recording paper.

Next, when it is desired to obtain the composition ratio of the input numerical data, the composition ratio key 4 is operated immediately after the operation of the sum key, and the process according to the flow shown in FIG. 5 is executed. That is, in executing step _S21 , if it is determined that the flag "1" indicating the previous operation of the total key is stored in the flag area F, the process moves to step _S22 . n in execution of step _S22
The numerical data stored in the A _o register specified by the index data of the register is transferred to the X register. Next, the process moves to step _S23 , where the numerical data in the X register is transferred to the printing unit 13 and printed on the recording paper. Next, the process moves to step _S24 , where the arithmetic circuit 11 executes a special operation to obtain a composition ratio in which the numerical data in the A _o register is divided by the total data in the T register, and the quotient is multiplied by "100". , the result of this operation is written to the X register. Then step
Step _S25 is executed, and the calculation result data stored in the X register is printed on the recording paper. Next, the process moves to step _S26 , where "1" is added to the contents of the n register and the index data is updated. Next, the process moves to step _S27 , where it is determined whether the index data of the n register has reached the final index data of the N register plus 1. If it is determined not, the process proceeds to step S27. ₂₂ to _S27 are repeatedly executed, and as a result, the composition ratios for each of the numerical data sequentially stored on the recording paper are sequentially printed together with the numerical data. If YES is determined in step _S27 , the process moves to step _S28 . In the execution of step _S28 , "0" is written to the n register. Next, proceed to step _S29 , and execute T.
The total data of the register is printed on the recording paper,
Furthermore, "100.0%" is printed.

In the above embodiment, the case where the composition ratio is calculated by operating the composition ratio key 4 is shown, but it can also be carried out in the same way when the change rate is calculated by operating the change rate key 5. The numerical data stored in sequence is read out, the rate of change between each numerical data is calculated, and the results are printed.

In addition, in the above embodiment, the condition was that the total key was operated before calculating the composition ratio, but this is not particularly limited. For example, the configuration for the subtotal value in the middle of the cumulative total The ratio may be calculated, and the rate of change may be calculated at any time.

Further, in the embodiment described above, an addition key is provided as an input key for inputting numerical data, but the present invention is not limited to this, and a subtraction key or the like may be used as an input key.

Further, in the above embodiment, if "1" is stored in the flag area F when the addition key is operated,
Although the memory contents of the flag areas F, n, and T registers are erased, the present invention is not limited to this, and the memory contents may be erased by operating the sum key twice in succession; in this case, the addition key operation Steps S ₁ to _{S 4} are no longer necessary.

As explained above, according to this invention, the first storage means sequentially stores the input numerical data, the second storage means stores the cumulative value of the numerical data, and the operation of the composition ratio calculation instruction key. , a data specifying means for sequentially specifying the data in the first storage means, a means for calculating the composition ratio by dividing the specified data by the cumulative value stored in the second storage means, and a means for calculating the composition ratio together with the specified data. Since we have provided a small electronic calculator equipped with a means to print Therefore, the usability of the computer can be improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic system configuration diagram showing an embodiment of this invention, Fig. 2 is a flowchart executed when the addition key is operated in the embodiment, Fig. 3 is a printing state diagram of the embodiment, and Fig. 4 is a flowchart executed when the total key is operated in the same embodiment, and FIG. 5 is a flowchart executed when the composition ratio key is operated in the same embodiment. 1... Input section, 4... Composition ratio key, 5... Change rate key, 9... Control circuit, 10... RAM, 11
...Arithmetic circuit, 13...Printing section.

Claims (1)

[Claims for Utility Model Registration] A keyboard having a numeric key, an input key, and a composition ratio calculation instruction key; an input number counting means for counting input key operations on the keyboard; a first storage means for sequentially storing numerical data obtained by operating the numeric keys on the keyboard in accordance with the count value of the counting means; and a cumulative calculation means for calculating the cumulative value of the numerical data when operating the input keys. and a second storage means for storing the calculation result of the cumulative calculation means; and by operating a composition ratio calculation instruction key on the keyboard, the numerical data stored in the first storage means is transferred to the input number counting means. a data specifying means for specifying data in the input order within the range indicated by the count value; and a composition ratio calculation for calculating a composition ratio by dividing the data specified by the data specifying means by the cumulative value stored in the second storage means. and printing means for printing the numerical data specified by the data specifying means and printing the calculation results of the composition ratio calculation means as a pair. calculator.