struct a { 
	virtual void print() { cout << "Je suis un a" << endl; } 
	~a();
}
struct b: public a {
	void print() { cout << "Je suis un b" << endl; }
	static char _storage[sizeof(b)];
	void *operator new(size_t) { return _storage; }
	~b();
};
b *un = new b, *deux = new b;
delete un;
deux -> print();	// Je suis un a