/in/foo.cc:9:12: error: ISO C++ forbids declaration of 'Polylist' with no type [-fpermissive]
   Polylist(){
            ^
/in/foo.cc: In member function 'int PolyList::Polylist()':
/in/foo.cc:10:3: warning: no return statement in function returning non-void [-Wreturn-type]
   };
   ^