func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int hour, minute, sleeph, sleepm;     char temp;     scanf( %d%c%d , &hour, &temp, &minute);     scanf( %d%c%d , &sleeph, &temp, &sleepm);     int shour, smin;     smin = minute - sleepm;     if (smin < 0) {       smin += 60;       hour--;     }     shour = hour - sleeph;     while (shour < 0) {       shour += 24;     }     if (shour < 10) cout <<  0 ;     cout << shour <<  : ;     if (smin < 10) cout <<  0 ;     cout << smin << endl;     return 0;   }   