Add 2 numbers and numbers given through the user

 #include<stdio.h>

#include<conio.h>

void main()

{

  //add 2 no.

    int a,b,sum;

    clrscr();

   

  printf("enter the value of a \n");

    scanf("%d",&a);

    

  printf("enter the value of b \n");

    scanf("%d",&b);

    

    sum=a+b;

  printf("the sum of a and b %d",a + b);

    getch ();

}

Output :

enter the value of a 30

enter the value of b 50

The sum of a and b is 80