#include<stdio.h>
#include<conio.h>
int main()
{
int a,b,c,add=0;  \\ variable declaration
clrscr();
printf("\n Enter first number"); \\enter first value in run
scanf("%d",&a);
printf("\n Enter second number");
scanf("%d",&b);
printf("\n Enter second number");
scanf("%d",&b);
add=a+b+c;                 \\ perform addition operation
printf("\n Sum result =%d",add);
return 0;
getch(); \\ it hold the output screen ,get one character then exit.
}