C-Programming Tutorials

C Program to Perform Addition, Subtraction, Multiplication and Division

C program to perform basic arithmetic operations of two numbers. Numbers are assumed to be integers and will be entered by the user.

#include <stdio.h>

int main()

{

    int first, second, add, subtract, multiply;

    float divide;

   printf("Enter two integers\n");

    scanf("%d%d", &first, &second);

    add        = first + second;

    subtract = first - second;

    multiply = first * second;

    divide     = first / (float)second;   //typecasting

    printf("Sum = %d\n",add);

    printf("Difference = %d\n",subtract);

    printf("Multiplication = %d\n",multiply);

    printf("Division = %.2f\n",divide);

   

    return 0;

}

When we divide two integers in C language we get integer result for example 5/2 evaluates to 2. As a general rule integer/integer = integer and float/integer = float or integer/float = float. So we convert denominator to float in our program, you may also write float in numerator. This is known as explicit conversion typecasting.

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