/in/foo.cc: In function 'void GetDayPerMo(int, int)':
/in/foo.cc:12:26: error: return-statement with a value, in function returning 'void' [-fpermissive]
  if (mo != 2)return Mo[mo];
                          ^
/in/foo.cc:13:23: error: return-statement with a value, in function returning 'void' [-fpermissive]
  return Mo[2] + Spc(yr);
                       ^
/in/foo.cc: In function 'int nextDay(int)':
/in/foo.cc:21:11: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  if (dy > GetDayPerMo)
           ^~~~~~~~~~~