#include <iostream>

using namespace std;

class A { 
  virtual void f(int x) throw () { cout << "A:f x = " << x << endl;}; 
public:
  void F( int x) {
    f(x);
  }

};

struct B : public A {
public: 
  void f(long y) throw () { cout << "B:f(long y) = " << y << endl;};
  void f(int  x) throw () { cout << "B:f(int  x) throw () = " << x << endl;};

};

int main() {
  A a;
  B b;

  a.F( 0);
  b.f( 1);
  b.f( 2l);

  A *pb = &b;

  pb->F( 3);
  pb->F( 4l);

  return 0;
}