foo.cc: In member function 'bool Array::DeleteByIndex(int)':
foo.cc:84:9: warning: control reaches end of non-void function [-Wreturn-type]
   84 |         }
      |         ^
foo.cc: In function 'int main(int, char**)':
foo.cc:110:25: warning: 'objArray.Array::arrayHead' may be used uninitialized [-Wmaybe-uninitialized]
  110 |         objArray.Display();
      |         ~~~~~~~~~~~~~~~~^~
foo.cc:107:15: note: 'objArray.Array::arrayHead' was declared here
  107 |         Array objArray(ary_nInstance, nSize);
      |               ^~~~~~~~

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