Addition in C

add.c

#include<stdio.h>
int main()
{
	// declare three variables.
	int a = 0, b = 0, sum = 0;
	printf("Please enter a number: \n" );
	// read first variable
	scanf("%d", &a);
	printf("Please enter second number: \n" );
	// read second variable
	scanf("%d", &b);
	// calculate sum of two variables
	sum = a + b;
	// show result
	printf("The sum of %d and %d is %d \n", a, b, sum );
}