A question about C + + type conversion

Let's start with this interview question:

Class classa{public    :    virtual ~ ClassA ()    {    }    virtual void Functiona ()    {    }};class classb{ Public    :    virtual void functionb ()    {    }};class-classc:public ClassA, public-classb{public    :}; ClassC Aobject; ClassA *pa = &aObject; ClassB *PB = &aObject; ClassC *pc = &aObject;

　　

Assuming that the classa* pA2 is defined, the following correct code is:pa2=static_cast<classa*> (PB); void* pvoid=static_cast<void*> (PB); Pa2=static_cast<classa*> (pVoid);p a2=pb;pa2=static_cast<classa*> (static_cast<classc*> (PB));

Right answer BD

　　

A question about C + + type conversion