C program to perform mathematical operations

Program code

#include <stdio.h>

#include <conio.h>

void main()

{

 int num1, num2, option;

 clrscr();

 printf(“Please input two integers.\n”);

 scanf(“%d\n%d”,&num1,&num2);

 printf(“1. Add +\n2. Subtract -\n3. Multiply X\n4. Divide /\nPlease enter the number that is given near the operation you want to perform, in the above menu.\n”);

scanf(“%d”,&option);

switch(option)

{

case 1:printf(“%d + %d = %d”,a,b,a+b);

break;

case 2:printf(“%d - %d = %d”,a,b,a-b);

break;

case 3:printf(“%d X %d = %d”,a,b,a*b);

break;

case 4:printf(“%d / %d = %d”,a,b,a/b);

break;

default:

printf(“Invalid option”);

break;

}

getch();

}

Example of output

Please input two numbers.

67

78

1. Add +

2. Subtract –

3. Multiply X

4. Divide /

Please enter the number that is given near the operation you want to perform, in the above menu.

1

67 + 78 = 145