/in/foo.cc: In function 'int main(int, char**)':
/in/foo.cc:312:6: warning: unused variable 'nNowYear' [-Wunused-variable]
  int nNowYear = 0, nNowMonth = 0, nNowDay = 0;
      ^~~~~~~~
/in/foo.cc:312:20: warning: unused variable 'nNowMonth' [-Wunused-variable]
  int nNowYear = 0, nNowMonth = 0, nNowDay = 0;
                    ^~~~~~~~~
/in/foo.cc:312:35: warning: unused variable 'nNowDay' [-Wunused-variable]
  int nNowYear = 0, nNowMonth = 0, nNowDay = 0;
                                   ^~~~~~~
/in/foo.cc:313:6: warning: unused variable 'nNowHour' [-Wunused-variable]
  int nNowHour = 0, nNowMinute = 0, nNowSecond = 0;
      ^~~~~~~~
/in/foo.cc:313:20: warning: unused variable 'nNowMinute' [-Wunused-variable]
  int nNowHour = 0, nNowMinute = 0, nNowSecond = 0;
                    ^~~~~~~~~~
/in/foo.cc:313:36: warning: unused variable 'nNowSecond' [-Wunused-variable]
  int nNowHour = 0, nNowMinute = 0, nNowSecond = 0;
                                    ^~~~~~~~~~
/in/foo.cc:314:6: warning: unused variable 'nAddSecond' [-Wunused-variable]
  int nAddSecond = 0;
      ^~~~~~~~~~