Geef de output van het onderstaande programma.

#include <iostream>

struct A {
  virtual void g() { std::cout << "A::g()" << std::endl; }
  virtual void f() = 0;
  ~A() { g(); }
};

struct B: public A {
public:
  void f() { std::cout << "B::f()" << std::endl; }
  void g() { std::cout << "B::g()" << std::endl; }
  ~B() { f(); }
};

int
main(int,char**) {
B  b;
}