// Quest for Dynamic Dispatch in C++
using namespace std;
#include<iostream>

// 1. Pry to the gods when all planets are aligned ....

class A
{
protected:
  int x;
public:
  A(int y) {x=y;}
  void f() { cout << "A.f, x is "<< x << endl; }
  virtual void g() { cout << "A.g\n"; }   
};

class B : public A   // public inheritance: publics stay public ("is a")
{
public:
  B(int y) : A(y*2) {}
  void f() { cout << "B.f, x is "<< x << endl; }
  void g() { cout << "B.g\n"; }
};


int main()
{
  A n(1);
  B m(1);
  n = m;   // What's the "type" of this object?
  n.f();
  n.g();  // still prints A.g !
  // only static dispatch is available here, despite virtual

  A *p = new B(1);
  p->f();  // still calls A.f
  p->g();  // finally calls B.g  DYNAMIC DISPATCH AT LAST!

  return 0;
}