/in/foo.cc: In member function 'bool Array::DeleteByIndex(int)':
/in/foo.cc:84:2: warning: control reaches end of non-void function [-Wreturn-type]
  }
  ^
/in/foo.cc: In function 'int main(int, char**)':
/in/foo.cc:108:20: warning: 'objArray.Array::arrayHead' may be used uninitialized in this function [-Wmaybe-uninitialized]
  objArray.Display();
                    ^