Write a C program sum of two numbers. 

#include<stdio.h>

#include<conio.h>

void main()

{

    int a,b,sum;

    printf("Enter first number:  ");

    scanf("%d",&a);

    printf("Enter second number:  ");

    scanf("%d",&b);

    sum=a+b;

    printf("sum=%d",sum);

    getch();

}