Write a program in c to enter a number and reverse it.

#include<stdio.h>
int main()
{
int num,rev,r,sum=0;
printf("Enter a number\n");
scanf("%d",&num);
while(num>0)
{
r=num%10;
sum=sum*10+r;
num=num/10;
}
printf("Reverse=%d",sum);
return 0;
}