Simple C program to reverse number.
#include<stdio.h>
int main()
{
int a,n,reverse=0;
printf("Enter a number: ");
scanf("%d",&n);
a=n;
while(n!=0)
{
reverse=reverse*10;
reverse=reverse+n%10;
n=n/10;
}
printf("Reverse number of %d = %d",a,reverse);
return 0;
}