Language: C++

#include <iostream>
using namespace std;

int main(){
    int S,s,h,m;
    cin >> S;			//秒数を変数Sに外部から読み込む
    h = S % 3600;			//
    m = (S - ( 3600 * h) ) % 60;
    s = S - (3600 * h) - (60 * m) ;
    cout << h << ":"<< m << ":" << s << endl;
    return 0;
}


Compiler output:
a.cc:5:1: error: extended character   is not valid in an identifier
    5 |     int S,s,h,m;
      | ^
a.cc:5:1: error: extended character   is not valid in an identifier
a.cc:5:1: error: extended character   is not valid in an identifier
a.cc:5:1: error: extended character   is not valid in an identifier
a.cc:6:1: error: extended character   is not valid in an identifier
    6 |     cin >> S;                   //秒数を変数Sに外部から読み込む
      | ^
a.cc:6:1: error: extended character   is not valid in an identifier
a.cc:6:1: error: extended character   is not valid in an identifier
a.cc:6:1: error: extended character   is not valid in an identifier
a.cc:7:1: error: extended character   is not valid in an identifier
    7 |     h = S % 3600;                       //
      | ^
a.cc:7:1: error: extended character   is not valid in an identifier
a.cc:7:1: error: extended character   is not valid in an identifier
a.cc:7:1: error: extended character   is not valid in an identifier
a.cc:9:1: error: extended character   is not valid in an identifier
    9 |     s = S - (3600 * h) - (60 * m) ;
      | ^
a.cc:9:1: error: extended character   is not valid in an identifier
a.cc:9:1: error: extended character   is not valid in an identifier
a.cc:9:1: error: extended character   is not valid in an identifier
a.cc:10:1: error: extended character   is not valid in an identifier
   10 |     cout << h << ":"<< m << ":" << s << endl;
      | ^
a.cc:10:1: error: extended character   is not valid in an identifier
a.cc:10:1: error: extended character   is not valid in an identifier
a.cc:10:1: error: extended character   is not valid in an identifier
a.cc:11:1: error: extended character   is not valid in an identifier
   11 |     return 0;
      | ^
a.cc:11:1: error: extended character   is not valid in an identifier
a.cc:11:1: error: extended character   is not valid in an identifier
a.cc:11:1: error: extended character   is not valid in an identifier
a.cc: In function 'int main()':
a.cc:5:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0int' was not declared in this scope
    5 |     int S,s,h,m;
      | ^~~~~~~
a.cc:6:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0cin' was not declared in this scope
    6 |     cin >> S;                   //秒数を変数Sに外部から読み込む
      | ^~~~~~~
a.cc:6:12: error: 'S' was not declared in this scope
    6 |     cin >> S;                   //秒数を変数Sに外部から読み込む
      |            ^
a.cc:7:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0h' was not declared in this scope
    7 |     h = S % 3600;                       //
      | ^~~~~
a.cc:8:5: error: 'm' was not declared in this scope; did you mean 'tm'?
    8 |     m = (S - ( 3600 * h) ) % 60;
      |     ^
      |     tm
a.cc:8:23: error: 'h' was not declared in this scope
    8 |     m = (S - ( 3600 * h) ) % 60;
      |                       ^
a.cc:9:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0s' was not declared in this scope
    9 |     s = S - (3600 * h) - (60 * m) ;
      | ^~~~~
a.cc:10:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0cout' was not declared in this scope
   10 |     cout << h << ":"<< m << ":" << s << endl;
      | ^~~~~~~~
a.cc:10:36: error: 's' was not declared in this scope
   10 |     cout << h << ":"<< m << ":" << s << endl;
      |                                    ^
a.cc:11:1: error: '\U000000a0\U000000a0\U000000a0\U000000a0return' was not declared in this scope
   11 |     return 0;
      | ^~~~~~~~~~