inheritance - Calling overridden child method from base method in c++ -

here code:

#include <iostream> class  { public:   void foo()   {     cout<<"this base foo()"<<endl;   }    void callfoo()   {     foo();   } };  class b: public { public:   void foo()   {     cout<<"this child foo()"<<endl;   } };  int main() {   b b;   b.callfoo(); //output: "this base foo()"   b.foo();     //output: "this child foo()"   return 0; } 

now when call b.callfoo(), instead of calling foo() of child class b, callfoo() calls foo() of base class a. in class b have overridden foo() new implementation, still callfoo() calling base foo() instead of child foo(). please if have explanation behaviour.

in c++, need explicitly mark methods overridable adding virtual keyword: virtual void foo().