KR20000025995A - Method for realizing calculation function of wireless mobile communication terminal - Google Patents

Abstract

PURPOSE: A method for realizing a calculation function of a wireless mobile communication terminal is provided to make unnecessary an additional input operation for selecting an operator by assigning five keys except numbers(0-9,.) as operands(+,-,*,/,=), to delete or modify operands and operators by storing the operators and numbers that a user inputs in a buffer, and to make possible a continuous calculation by using the operands that the user inputs. CONSTITUTION: A method for realizing a calculation function of a wireless mobile communication terminal includes a first through eighth steps. The first step is to store a first operand into a first input buffer. The second step is to store the operators of +,-,*,/ into a predetermined position of the input buffer after performing the first step when inputting the operators. The third step is to store a second operator into a second input buffer after the second step. The fourth step is to perform the related calculation according to the operator stored in an operational buffer in the second step when the operator of '=' is input after the third step. The fifth step is to display the value resulted from the calculation performed in the fourth step on a monitor. The sixth step is to perform again the first through fifth steps when the operand is input after the fifth step, to process the result value of the calculation displayed in the fifth step as a first operand when the operand is input, and then perform again the third step through the fifth step. The seventh step is to override the operators of +,-,*,/ in the operational buffer which the operator is stored in the second step when the operators of +,-,*,/ are input in the third step, and to output the first operand without performing a calculation by performing the fifth step when the operator of '=' is input. The eighth step is to store the operators of +,-,*,/ in the operational buffer when the operators of +,-,*,/ are input in the first step, to process the first operand as an integral '0' and then perform again the third step through seventh step.

Description

Implementation method of calculation function of wireless mobile communication terminal

The present invention implements a calculation function of a wireless mobile communication terminal that can be used as a portable simple calculator that is easy to use and convenient for a user by performing arithmetic operations including real number calculation using a calculation function provided by a wireless mobile communication terminal. It is about a method.

In general, the wireless mobile terminal is to perform a phone call function, in addition to the voice call service, memory functions for storing and retrieving a phone number, automatic call-in / out function, current time and day display function, automatic power off function, emergency It provides various additional functions such as telephone dialing function, lock function, alarm function, area code confirmation function, melody input function and bio rhythm confirmation function.

In this case, the wireless mobile communication terminal also provides a service for performing arithmetic operations in addition to the above additional functions.

In the conventional method provided by the wireless mobile communication terminal, the first operand is input, and then an operator is selected using a predetermined key (for example, a jog shuttle), and finally, after inputting the second operand. Again, the operation was performed using the predefined key.

However, the conventional operation method as described above not only has a disadvantage in that several key inputs are required for one operation, but also continuous calculation is possible only as a calculation result value, and input of consecutive operands is impossible. There was a problem that operands and operators cannot be deleted or modified.

The present invention has been made to solve the above problems, the purpose of which is to assign five keys other than the numbers ('0-9', '.') By the operator ('+-× ÷ =') ( For example, the '*' key is assigned as a multiply operator ('×'). There is no need for additional input operations for operator selection, and the user can enter or delete operands and operators by storing them in a buffer. In addition, the present invention provides a method of implementing a calculation function of a wireless mobile communication terminal that enables continuous calculation as well as a calculation result value as an operand input by a user.

It is another object of the present invention, it is possible to perform a real operation including a decimal point and to extend the calculation range up to 9 digits including a decimal point, to display a calculation error such as overflow easily, and also conventional operator selection method The present invention provides a method for implementing a calculation function of a wireless mobile communication terminal to provide a convenient user interface.

1 is a block diagram of a typical wireless mobile communication terminal,

2 is a flowchart illustrating an operation of inputting an operand and an operator and calculating the operator according to an operator in a method of implementing a calculation function of a wireless mobile communication terminal according to the present invention;

3 is a flowchart illustrating an operation for continuous calculation in a method for implementing a calculation function of a wireless mobile communication terminal according to the present invention;

4A is a diagram illustrating a screen processing state when division is performed by '0', and (B) is a diagram showing a screen processing state when an overflow error occurs.

<Description of the symbols for the main parts of the drawings>

1: main processor unit 2: RF unit

3: memory unit 4: currency

5: LCD display and keypad input unit

In order to achieve the above object, a method of implementing a calculation function of a wireless mobile communication terminal of the present invention includes a process of inputting an operand and an operator necessary for an operation, a process of deleting or modifying an input operand and an operator, and a calculation error to be easily understood. It is characterized by consisting of a process of displaying on the screen, and the process of displaying the result of the operation processing on the screen clearly.

Hereinafter, a method of implementing a calculation function of a wireless mobile communication terminal according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a typical wireless mobile communication terminal, comprising: a main processor unit 1 for managing and controlling all functions of a wireless mobile communication terminal, and an RF unit 2 for wireless data transmission / reception; A memory unit 3, comprising a nonvolatile memory 3A, a data memory 3B, and a program memory 3C, for storing data such as user information and call information; A communication path 4 composed of a microphone and an earpiece to which a user can talk; It is configured to display the status of the wireless mobile communication terminal, and include an LCD display window and a keypad input unit 5 necessary for dialing, volume control, and other terminal operation.

Referring to the drawings, a method for implementing a calculation function according to the present invention in a wireless mobile communication terminal configured as described above is as follows.

First, an operation of inputting an operand and an operator in a method of implementing a calculation function of a wireless mobile communication terminal according to the present invention will be described with reference to FIG. 2.

When the user inputs operands of '0 to 9', '.' Through the keypad input unit 5 of the terminal (S1), the input operand is stored in the first input buffer of the data memory 3B (S2), Subsequently, when a predefined operator of '+-× ÷' (for example, the '*' key is a multiplication operator) is entered (S3), the operator is stored in a predetermined position in the operation buffer of the data memory 3B. (S4).

Again, the operand is input and stored in the second input buffer of the data memory 3B (S5, S6).

As described above, the operands of the numbers input by the user are sequentially stored in the input buffer to form the first operand and the second operand, respectively.

Subsequently, when the user inputs an operator of '=' (S7), the main processor unit 1 adds (+), subtracts (-), multiplies (×), according to the operator stored in the operation buffer in the step (S4). Each operation of division (÷) is performed (S9), and the result of the calculation is displayed on the LCD display window 5 of the wireless mobile communication terminal (S10).

Then, if the operand is input again, step S2 is performed again or less (S11), while if an operator is input, the operation result value displayed in step S10 is treated as the first operand and then step S5. The following operation is performed again (S12, S13).

On the other hand, if the operator of the '+-× ÷' rather than the operand in the step (S5) is input again (S14) This is to modify the operator, the operator in the operation buffer stored the operator in the step (S4) If the operator inputs '=' (S16), the process proceeds to step S10 to output the first operand without performing an operation process.

In addition, in the initial state, when an operator of '+-× ÷' is entered instead of an operand in step S1 (S17), the operator is stored in the operation buffer (S18), and the first operand is an integer '0'. Process (S19) and then proceed to step (S5) to perform the following process.

Next, an operation for continuous calculation in the method for implementing the calculation function of the wireless mobile communication terminal according to the present invention will be described with reference to FIG. 3.

In this case, the same steps as in the operation in FIG. 2 will be described with the same reference numerals.

When the user inputs operands of '0 to 9' and '.' Through the keypad input unit 5 of the terminal (S1), the input operand is stored in the first input buffer (S2), and then '+-× ÷' When the operator of '(S3) is stored in the first operation buffer (S'4), and then enter the operands (S5) is stored in the second input buffer (S6).

Subsequently, if an operator of '+-× ÷ =' is input for continuous calculation (ST1), the operator is stored in the second operation buffer (ST2).

Then, according to the operator stored in the first operation buffer in the step (S'4) (ST3) of the addition (+), subtraction (-), multiplication (x), division (÷) in the main processor unit (1) Each operation is performed (S9), the contents stored in the second operation buffer are transferred to the first operation buffer (ST4), and the operation result value performed in the step S9 is displayed on the LCD display window 5 (S10). .

Then, if the operand is input again, it is checked whether the contents of the first operation buffer is '=' (ST5), and if it is not '=', the process is performed again (S6) or less and if it is '=', the step (S2). While the following operation is performed again (S11), inputting an operator of '+-× ÷' causes the operation result value displayed in the step S10 to be processed as the first operand and then performs the step S5 or less again. (S12, S13).

On the other hand, if the operator of '+-× ÷' rather than the operand in the step (S5) is input again (S14) to overwrite the input operator to the first operation buffer stored in the step (S'4) At this time, if the operator of '=' is input (S16), the step S10 or less is performed again.

In addition, when an operator of '+-× ÷' other than an operand is input in the initial state (S1) (S17), the operator is stored in the first operation buffer (S'18), and the first operand is stored. After processing to an integer '0' (S19) to proceed to the step (S5) to perform the following process.

The difference of FIG. 3 with respect to FIG. 2 is that except for the first operator input, all the operators input after are stored in the second operation buffer (predetermined position of the input buffer, for example, just before the last position) and after calculation. It is moved back to the first operation buffer.

In the present invention, the number stored by the user is stored in the first input buffer, and the value is maintained until the operator enters the input buffer. In this case, when the user inputs a predetermined erase (CE function of the simple calculator) key, the buffer is stored in the buffer. You can erase stored numbers one by one.

Accordingly, when all the numbers input by the user are deleted, the initial state is entered, and the input number can be input up to 9 digits including the decimal point.

Then, when the user inputs a predefined operator key of '+-× ÷', the selected operator is stored in a predetermined position of the input buffer (for example, the last position of the input buffer).

In this case, when inputting an operator, a method of selecting a desired operator from among operators displayed by pressing an operator selection key may be used.

If you press the operator selection key, the operator of '+-× ÷' is displayed on the LCD display (5). By default, the '+' operator flashes and the left and right selection keys (for example, '↑' and '↓' keys) Press to make a selection and press the Save key (for example, the 'Save' key) to save.

In this case, when another operator is input or selected, including a pre-selected operator without inputting a second operand, the last input or selected operator is stored at a predetermined position of the input buffer.

The number entered by the user is then stored in the second input buffer, and the value is retained until the next operator is entered, which is the same as entering the first number.

Finally, the user performs an operation in accordance with one of the predefined '+-× ÷' operators and displays the result on the terminal LCD display (5), where the selected operator selects the operator described above for continuous calculation. Like the method, it is stored in a predetermined position of the input buffer to prepare for the next operation.

In this case, the operator except '=' can be modified in the above manner.

On the other hand, in the present invention, in addition to the operand and the operator input method is performed a process of processing a calculation error that may occur in the calculation process.

For example, if the user inputs '0' as the number of jets when performing the division, the display is displayed on the LCD display 5 of the terminal as shown in FIG. 4A to divide the division into '0'. Inform the user that a division error has occurred and avoid continuous calculations.

Second, in case of an overflow error exceeding the number of digits that can be accommodated in the calculation process, as shown in (b) of FIG. 4, the result value together with the number of digits overflowed on the LCD display window 5 of the terminal. Only up to nine digits including the decimal point from the first digit are displayed to indicate that an overflow error has occurred, and continuous calculation is prevented as in the operation error.

As described above, the method of implementing the calculation function of the present invention may be regarded as a six-part process, in which a first user inputs operands for inputting first and second operands to perform calculations.

Second, the process of deleting or modifying operands if desired by the user. The process of deleting or modifying an incorrect number entered by the user.

Third, a process of inputting an operator, a process of inputting a desired operator ('+-× ÷ ='), and a process of inputting an operator by selecting from among operators or pressing a predefined key as in the conventional method. to be.

Fourth, the process of modifying the operator if the user wants to.

Fifth, as an actual operation process, an operation (addition, subtraction, multiplication, division) is performed by operands and operators input by a user.

Sixth, as a process of processing arithmetic errors that may occur in the calculation process, it is a process of preventing continuous calculation by handling an error divided by '0' and an overflow error.

As described above, the present invention adds an easy-to-use and easy-to-use calculator function to the wireless mobile communication terminal to perform a sufficient role as a portable simple calculator and to use a conventional method in parallel. In addition to improving the base of the wireless mobile communication, there is an effect that can be easily applied to all future wireless mobile communication terminal development.

Claims (3)

In a method of implementing a calculation function using a calculation function in a wireless mobile communication terminal, A first step of storing the first operand in the first input buffer, A second step of storing an operator of '+-× ÷' in a predetermined position of the operation buffer after performing the first step; A third step of storing a second operand after inputting the second operand after performing the second step; A fourth step of performing a corresponding operation according to the operator stored in the operation buffer in the second step when inputting an operator of '=' after performing the third step; A fifth step of displaying the calculation result value performed in the fourth step on a screen; After performing the fifth step, if the operand is input, the first step is performed again. If the operator is input, the operation result value displayed in the fifth step is treated as the first operand and the sixth step is performed again. Steps, In the third step, when an operator of '+-× ÷' is input, which is not the second operand, the operator overwrites the operation buffer in which the operator is stored in the second step, and in the case of inputting the operator of '=' A seventh step of outputting the first operand as it is without performing the operation process in step 5; In case of inputting an operator of '+-× ÷' rather than the first operand in the first step, the operator stores it in the operation buffer, processes the first operand as an integer '0', and then re-executes the third step or less. A method of implementing a calculation function of a wireless mobile communication terminal, comprising the eighth step. The method of claim 1, wherein the continuous calculation process in the method of implementing a calculation function using the arithmetic function in the wireless mobile communication terminal is performed when the first operator of '+-× ÷' is input after performing the first step. A first process of storing in the operation buffer and proceeding to a third step; A second process of storing a second operator of '+-× ÷ =' after the third step is stored in the second operation buffer; A third process of performing a corresponding operation according to an operator stored in a first operation buffer in the first process after performing the second process; A fourth process of moving to the fifth operation after transferring the contents stored in the second operation buffer to the first operation buffer after performing the third process; After performing the fifth step, if the operand is input, it checks whether the contents of the first operation buffer is '=' and if the '=' is not repeated, performs the third step or less and if the '=', the first step or less Performing a re-run, and inputting an operator of '+-× ÷', a fifth step of treating the operation result value displayed in the fifth step as the first operand and then performing the third or less step again; In the third step, when an operator of '+-× ÷' is entered instead of the second operand, the operator overwrites the first operator buffer in which the first operator is stored in the first step, and inputs an operator of '='. In the case of the sixth step of performing the fifth step or less again, In the case of inputting an operator of '+-× ÷' rather than the first operand in the first step, it is stored in the first operation buffer, the first operand is treated as an integer '0', and then A method of implementing a calculation function of a wireless mobile communication terminal, comprising the seventh step of re-execution. The terminal of claim 1, wherein when a division is performed during the calculation process, a user inputs a '0' as the number of jets or an overflow error exceeding the number of digits that can be accommodated in the calculation process. Method of implementing a calculation function of a wireless mobile terminal characterized in that the display of the screen to inform the user of the error occurrence and prevent continuous calculation.