我有点困惑。在C ++中，您可以分配指向基类的派生类的地址吗？反过来怎么样？

问题描述

1。你可以将派生类的对象的地址分配给指向基类的指针吗？



2.你能指定一个基类对象的地址吗？指向派生类的指针？



我尝试过：



我试着读一本充满错误和令人困惑的解释的书。

1. Can you assign the address of an object of a derived class to a pointer to the base class?

2. Can you assign the address of an object of a base class to a pointer to the derived class?

What I have tried:

I tried reading a book full of errors and confusing explanations.

推荐答案

BaseClass* pBase = ....;
DerivedClass* pDerived = dynamic_cast<derivedclass*> (pBase);
if (pDerived != 0)
{
   // yes - pBase was really pointing to a DerivedClass object
   // an now we can use pDerived to access the derived class's members
   .....
}

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