/in/foo.cc: In member function 'prec prec::operator-(int)':
/in/foo.cc:148:2: warning: no return statement in function returning non-void [-Wreturn-type]
  }
  ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:35:50: warning: 'w' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int length=strlen(s),size=(length+SIZE-1)/SIZE,w;
                                                  ^