func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, a[101], x = 0;     string s1, s2;     cin >> s1 >> s2;     for (int i = 0; i < s1.size(); i++) {       if (s1[i] != s2[i])         a[i] = 1;       else         a[i] = 0;       x++;     }     for (int i = 0; i < x; i++) {       cout << a[i];     }     return 0;   }   