#include <iostream>

class Base {
public:
  void methodA() {
    std::cout << "Base::methodA" << std::endl;
  }
};

class Derived : public Base {
public:
  void methodA() {
    std::cout << "Derived::methodA" << std::endl;
  }
};

int main( int argc, char **argv )
{
  Derived obj;
  Base* ptr = &obj;

  ptr->methodA();
  obj.methodA();

  return 0;
}