Program to read a number, find the sum of the digits, reverse the number and check it for palindrome

#include <stdio.h>

 void main () 

 { 

 int n, num, digit, rev = 0, sum = 0;

 printf ("enter one number\n");

 scanf ("%d", &n); 

 num = n; 

 while (n != 0) 

 { digit = n % 10; 

 sum += digit;

 rev = rev * 10 + digit; 

 n = n / 10; 

 } 

 printf ("Sum of digits of %d is %d\n", num, sum); 

 printf ("reverse of %d is %d\n", num, rev); 

 if (num == rev)

 printf ("%d is palindrome", num);

 else

 printf ("%d is not palindrome", num); 

 }