>>469
class A {
public:
　~A() { cout << "~A" << endl; }
　void foo() { cout << "A" << endl; }
};

class B : public A {
public:
　virtual ~B() { cout << "~B" << endl; }
　virtual void foo() { cout << "B" << endl; }
};

class C : public B{
public:
　virtual ~C() { cout << "~C" << endl; }
　virtual void foo() { cout << "C" << endl; }
};

main() {
　A* a = new C;　// 危険
　a->foo();
　delete a;

　B* b = new C;
　b->foo();
　delete b;
}

さて、何がどう呼ばれるでしょう？