JPH0755635Y2 - Small electronic calculator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a small-sized electronic computer of a calculation method used for function calculation having a plurality of solutions.

[Prior Art and its Problems] Conventionally, a small-sized electronic computer of a calculation method according to a format, when an operator having a plurality of solutions is formed in a mathematical expression, the fixed one of the plurality of solutions is determined depending on the calculation of the mathematical expression. Since only the solution can be calculated, continuous calculation using other solutions is impossible, and there is a drawback in that it is not convenient in this respect.

[Object of the Invention] The present invention has been made in view of the above circumstances. When a complex number, which is an operator having a plurality of solutions, is incorporated into a calculation formula,
A small electronic computer that can easily perform continuous calculation using any of two variables expressed in plural prime Cartesian coordinates and two variables expressed in polar coordinates and can improve usability. The purpose is to provide.

[Points of the Invention] In this invention, the polar coordinate specification key or the rectangular coordinate specification key is used to specify whether the polar coordinate is obtained from the rectangular coordinate or the rectangular coordinate from the polar coordinate, and the polar coordinate is specified by the switching key. If so, select two polar coordinate variables alternately, and if Cartesian coordinates are specified, alternately select two Cartesian coordinate variables to display the selected and specified variables. In the state, if the polar coordinates are specified, if the values of two variables in Cartesian coordinates are entered, and if the Cartesian coordinates are specified, the values of two variables in polar coordinates are entered. The values of the two variables of the other coordinate are calculated from the values of the two variables of the coordinate, and the continuous operation is performed using the value of the variable selected and designated by the switching key among the values of these two variables. There is.

[Embodiment of the Invention] An embodiment of the invention will be described below with reference to the drawings.

In this case, in the same embodiment, this invention is applied to the Cartesian coordinates (x,
y) and polar coordinates (r, θ) are applied to a computer that can be obtained.

FIG. 1 shows the circuit configuration of the embodiment. In the figure, reference numeral 1 is a key input section, which is a function key 1a, a numeric key 1b, a "Pol" key 1c for specifying polar coordinates, a "Rec" key 1d for specifying rectangular coordinates, and a switching key 1.
e, has "EXE" key 1f.

Then, the key input data from the key input unit 1 is sent to the key determination unit 2. The key judgment unit 2 judges the key input data, and gives the execution data to the control unit 3 to "switch",
The "Pol, Rec" command is given to the switching character generator 4 so that the character data is given to the input buffer 5.

The control unit 3 is composed of a ROM or the like, and stores a program for controlling each circuit in advance. In this case, the control unit 3 gives a control command to the pointer control unit 6, the calculation unit 7, and the register designation unit 8. The switching character generator 4 is adapted to give a switching character to the input buffer 5 according to the "switch" and "Pol, Rec" commands from the key input unit 1. The input buffer 5 stores the input data given by the key determination unit 2, and gives this data to the display unit 9 for display and also to the arithmetic unit 7. The pointer control unit 6 controls the pointer in the input buffer 5. The operation unit 7 sequentially reads the data in the input buffer 5 by the pointer, executes the operation based on the data read from the register 10, and gives the operation result to the display unit 9. Here, the register 10 has an A register 101 and a B register 102, and the contents of the register designated by the register designating unit 8 are read out.

Next, the operation of the embodiment thus configured will be described.

First, as shown in FIG. 4 (a), “1
When "2" and "+" are input, these input data are sent to the input buffer 5 via the key determination unit 2 and displayed on the display unit 9. Next, as shown in FIG. 3B, the "Pol" key 1c
When is operated, the input flow shown in FIG. 2 is executed.
In this case, YES is determined in step A1, and the process proceeds to step A2. Then, in step A2, it is determined to be Pol, the process proceeds to step A3, and Pol (r) is displayed on the display unit 9. Then, the process returns to step A1.

From this state, as shown in Fig. 4 (c), the "switch" key
When 1e is operated, the process proceeds to step A4, where YES is determined, and the process proceeds to step A5. Then, in step A5, Po
Since l (r) is displayed, it is determined to be YES, so that the process proceeds to step A6, and the display unit 9 is switched and displayed as Pol (θ).

If you pressed the "Rec" key 1e, step A2
Then, it is judged as Rec, and the procedure proceeds to step A7, where Rec is displayed on the display unit 9.
(X) is displayed. If the "switch" key 1e is operated from this state, YES is determined in step A4, NO is determined in step A5, and the process proceeds to step A8, where YES is determined. ) Is switched and displayed.

Next, from the display state of FIG. 4 (c), when "3" and "4" are sequentially input from the key input unit 1 as shown in (d) and (e) of FIG. 4, these input data are input buffer 5 And is displayed on the display unit 9. When the "EXE" key 1f is operated as shown in FIG. 4 (f),
The process moves to the execution flow shown in FIG. In this case, the data is read in step B1, and it is determined in steps B1 and B2 whether it is "Pol" or "Rec" data. The input data up to “12+” is subjected to other processing (normal arithmetic processing), “Pol (θ)” is read, and since YES is determined in this step B2, the process proceeds to step B3, x, y
Calculation result of r using the values of (3, 4) [= (x ² + y ² ) ^1/2 ]
Is in the A register 101, the calculation result of θ [= cos ^-1 (x / A)]
Is written into the B register 102. Next, the process proceeds to step B4, but since θ is determined here as is clear from the display on the display unit 9 of FIG. 4 (c) and thereafter, the process proceeds to step B5, and the B register 102 is set by the register designating unit 8. It is specified. As a result, the previously processed "12+" is given to the arithmetic unit 7 together with the value written in the B register 102 in step B6.
The solution θ can be obtained as shown in.

If the "switch" key 1e shown in FIG. 4 (c) is not operated and the display on the display unit 9 remains Pol (r), r is determined in step B4, so the step
In step B7, the register designating section 8 designates the A register 101. Then, in step B6, the A register 101
The value written in is given to the calculation unit 7, and the calculation result here obtains the calculation result using the solution r. If Rec (x) or Rec (y) is displayed on the display unit 9 by operating the "Rec" key 1d described above, NO is determined in step B2 and YES is determined in step B8. Go to B9. And (r,
θ) calculated value of x [= r
cos θ] is stored in the A register 101, and the calculated value of y [= r sin
θ] is written in the B register 102, and the process proceeds to step B4,
If x is determined here, the process proceeds to step B11, the A register 101 is designated by the register designating unit 8, and if y is determined, the process proceeds to step B12 and the B register 102 is designated by the register designating unit 8. . This results in step B6
At, the calculation value written in the A register 101 or the B register 102 is given to the calculation unit 7, and the calculation result here makes it possible to obtain the calculation result using the solution x or y.

Therefore, if you do this, you can specify polar coordinates with the "Pol" key and Cartesian coordinates with the "Rec" key, and specify one of the solutions for the coordinates specified with the "Switch" key. Since it is possible to execute continuous operations with any of the indicated solutions, when a conventional operator with multiple solutions is combined, only one solution can be used for some continuous operations. Compared to what was impossible to perform continuous operations using solutions other than
The usability can be dramatically improved.

[Effect of the Invention] According to the present invention, the polar coordinates can be obtained from the rectangular coordinates by using the polar coordinates specifying key or the rectangular coordinates specifying key.
In addition to specifying whether to obtain rectangular coordinates from polar coordinates, use the switching key to alternately select and specify two variables of polar coordinates when polar coordinates are specified, and when rectangular coordinates are specified, Select two variables alternately, display the selected variables, and in this state, if polar coordinates are specified, enter the values of the two variables in Cartesian coordinates and the Cartesian coordinates will be specified. If the values of the two variables in polar coordinates are entered, the values of the two variables in the other coordinates are obtained from the values of the two variables in the entered one coordinate, and the switch key of the values of these two variables is selected. Since the continuous calculation is performed using the value of the variable selected and specified in, it is possible to easily perform continuous calculation using either of the two variables of polar coordinates and the two variables of rectangular coordinates. , Easy to use Correct can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of an embodiment of the present invention, FIGS. 2 and 3 are flow charts for explaining the operation of the embodiment, and FIG. 4 is a key input section of the embodiment. It is a figure for demonstrating the relationship of the key input of, and the display on a display part. 1 ... key input part, 1c ... "Pol" key, 1d ... "Rec" key,
1e ... "switch" key, 3 ... control part, 4 ... switch character generation part,
5 ... Input buffer, 7 ... Arithmetic unit, 8 ... Register designating unit,
9 ... Display unit, 101 ... A register, 102 ... B register.

Claims (1)

[Scope of utility model registration request] 1. A small electronic computer having a format-based operation function for performing an operation according to an input calculation expression, and a polar coordinate specification key for specifying polar coordinates and a rectangular coordinate specification for specifying rectangular coordinates. And a switch for alternately selecting and designating two polar coordinate variables when the polar coordinate is designated, and alternately selecting and designating two rectangular coordinate variables when the rectangular coordinate is designated. When the polar coordinates are specified in the state where the key, the selected variable display control means for displaying the variable selected and specified by the switching key, and the variable selected and specified by the selected variable display control means are displayed. Inputting the values of the two variables in Cartesian coordinates, and inputting the values of the two variables in polar coordinates when the Cartesian coordinates are specified, and the inputting means The means for obtaining the values of the two variables of the other coordinate from the values of the two variables of the one coordinate, and the value of the variable selected and designated by the switching key among the values of the two variables obtained by this means A small-sized electronic computer, comprising: a control unit that continues calculation by using.