C Program to find sum and reverse of a number

Aim: FInd sum and reverse of a number using C.

#include<stdio.h>
main()
{
	int n,d,s,r;
	printf("Enter a number : ");
	scanf("%d",&n);
	s=r=0;
	while(n!=0)
	{
		d=n%10;
		s+=d;
		r=r*10+d;
		n/=10;
	}
	printf("\nSum = %d",s);
	printf("\nReverse = %d",r);
	return 0;
}