#include <async.h>

class A {
  int _x;

public:
  A () : _x (5) {}
  void print () { warn << "x = " << _x << "\n"; }
};

class B : public A {
  int _y;

public:
  B (int y) : _y (y) {}
  void print () { warn << "y = " << _y << "\n"; }
};

int
main ()
{
  B b (3);
  b.print ();

  A z = b;
  z.print ();
}