继承问题

[tsuibin]

Class A{ }; Class B{ }; Class C : A, B{ };

C * pointerC = new C; B pointerB = (B)pointerC;

pointerB 如何知道指向的类(pointerC)是否继承了 Class A ?

[pagict]

dynamic_cast

[noli]

答案是无法知道。