C Program for Basic Calculator Using switch स्विच का उपयोग करके Basic Calculator बनाना

A basic calculator performs arithmetic operations such as addition, subtraction, multiplication, and division. In C language, we can use the switch statement to perform these operations based on the user's choice.

एक Basic Calculator Addition, Subtraction, Multiplication और Division जैसी arithmetic operations करता है। C भाषा में switch statement का उपयोग करके user की choice के आधार पर इन operations को perform किया जा सकता है।

C Program

#include <stdio.h>
int main(void)
{
    float a, b, ans;
    int choice;
    while (1)
    {
        printf("\nBasic Calculator\n");
        printf("1. Addition\n");
        printf("2. Subtraction\n");
        printf("3. Multiplication\n");
        printf("4. Division\n");
        printf("5. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        if (choice == 5)
            break;
        if (choice < 1 || choice > 5)
        {
            printf("Wrong input\n");
            continue;
        }
        printf("Enter two numbers: ");
        scanf("%f %f", &a, &b);
        switch (choice)
        {
            case 1:
                ans = a + b;
                printf("Answer = %f\n", ans);
                break;
            case 2:
                ans = a - b;
                printf("Answer = %f\n", ans);
                break;
            case 3:
                ans = a * b;
                printf("Answer = %f\n", ans);
                break;
            case 4:
                if (b != 0)
                {
                    ans = a / b;
                    printf("Answer = %f\n", ans);
                }
                else
                {
                    printf("Division by zero is not allowed\n");
                }
                break;
        }
    }
    return 0;
}

Output

Basic Calculator
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. Exit
Enter your choice: 1
Enter two numbers: 10 5
Answer = 15.000000

Explanation

• while(1) repeats the calculator menu until the user chooses Exit.

• switch(choice) selects the arithmetic operation.

• case 1 performs Addition.

• case 2 performs Subtraction.

• case 3 performs Multiplication.

• case 4 performs Division, after checking that the second number is not zero.

• case 5 exits the program using break.

• default-like validation checks invalid choices.

switch(choice) user की choice के अनुसार operation select करता है। Division करने से पहले यह जाँच की जाती है कि दूसरा number zero न हो। User द्वारा 5 चुनने पर calculator बंद हो जाता है।

Modern C Compatibility Note

This program uses standard C and works with modern compilers such as GCC, Clang, and Visual Studio C. It does not require conio.h, clrscr(), getch(), or exit().

This program demonstrates how to create a basic calculator using the switch statement and a loop in C.

यह program C भाषा में switch statement और loop का उपयोग करके Basic Calculator बनाना सिखाता है।