C++ Reverse Of Number

#include<iostream>
using namespace std;
int main()
{
    int n, r, s = 0;

    cout << "Enter A Number : ";
    cin >> n;
    cout << endl;

    while(n != 0)
    {
        r = n % 10;
        s = s * 10 + r;
        n = n/10;
    }

    cout << "Reverse of Input Number : " << s << endl;

    return 0;
}