// B5.cpp - redefine only base member functions that are virtual

#include <iostream>
using namespace std;

class B {
  public:
    void mf1() { cout << "\n  B::mf1() called"; }
    void mf1(int i) { cout << "\n  B::mf1(int i) called"; }
    virtual void mf2() { cout << "\n  B::mf2() called"; }
    virtual ~B() { }

};

class D : public B {

  public:
    void mf1() { cout << "\n  D::mf1() called"; }  // logical error
    void mf2() { cout << "\n  D::mf2() called"; }
    virtual ~D() { }
};

void main() {

  B b1;
  B *pB = &b1;
  pB->mf1();
  pB->mf1(0);
  pB->mf2();

  D d1;
  pB = &d1;
  cout << "\n-- redefining non-virtual functions breaks polymorphism";
  pB->mf1();
  pB->mf1(0);
  cout << "\n-- this next call is ok, redefined virtual function";
  pB->mf2();

  d1.mf1();   // works correctly
//d1.mf1(5);  // won't compile, hidden by D::mf1()
}