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C program to perform addition, subtraction, multiplication and division

C program to perform basic arithmetic operations which are addition, subtraction, multiplication, and division of two numbers. Numbers are assumed to be integers and will be entered by a user. In C language when we divide two integers we get an integer as a 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 the numerator. This explicit conversion is known as typecasting.

C programming code

  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5.    int first, second, add, subtract, multiply;
  6.    float divide;
  7.  
  8.    printf("Enter two integers\n");
  9.    scanf("%d%d", &first, &second);
  10.  
  11.    add = first + second;
  12.    subtract = first - second;
  13.    multiply = first * second;
  14.    divide = first / (float)second;   //typecasting
  15.  
  16.    printf("Sum = %d\n", add);
  17.    printf("Difference = %d\n", subtract);
  18.    printf("Multiplication = %d\n", multiply);
  19.    printf("Division = %.2f\n", divide);
  20.  
  21.    return 0;
  22. }

Output of program:
Arithmetic operations C program

Download Arithmetic operations program.