palindrome check in c++

Check the no is palindrome or not.
How to test a number is palindrome or not in c++
 Write a program to check no is palindrome or not.

#include<iostream>

int checkPalindrome(int);

int main(){

    int num,sum;

    cout << "Enter a number: ";

    cin >> num;

    sum = checkPalindrome(num);

    if(num==sum)

         cout << num << " is palindrome";

    else

       cout << num << " is not palindrome";

    return 0;

}

int checkPalindrome(int num){

    static int sum=0,r;

    if(num!=0){

         r=num%10;

         sum=sum*10+r;

         checkPalindrome(num/10);

    }

    return sum;

}