poj 1504 Adding Reversed Numbers

#include <iostream>using namespace std;int main(){    int tc, m, n, ans, tmp;    cin >> tc;    while (tc--)    {         cin >> m >> n;         tmp = 0;         while (m)         {               tmp = m % 10 + tmp * 10;               m /= 10;         }          m = tmp;         tmp = 0;         while (n)         {               tmp = n % 10 + tmp * 10;               n /= 10;         }         n = tmp;         tmp = m + n;         ans = 0;         while (tmp)         {               ans = tmp % 10 + ans * 10;               tmp /= 10;         }         cout << ans << endl;    }        system("pause");}