P3.14 X84338 Related sum of the halves of a number

#include <iostream>
using namespace std;

int main() {
        int n, xf = 0, a  = 0, b = 0;
        cin >> n;
        for (int i = n; i != 0; i = i/10) ++xf;
        if (xf%2 != 0 or n == 0) cout << "nothing" << endl;
        else {
                xf = (xf/2);
                for (int at = xf; at != 0; --at) {
                        a = a + n%10;
                        n = n/10;
                }
                for (int bt = xf; bt != 0; --bt) {
                        b = b + n%10;
                        n = n/10;
                }
                if (a > b) cout << b << " < " << a << endl;
                else if (a < b) cout <<  b << " > " << a << endl;
                else cout << b << " = " << a << endl;
        }

}