对类对象的文件读写操作

Question

小弟是C++新手，遇到一个问题。

我有一个基类和一个派生类，基类中有虚函数，派生类拓展这个虚函数的功能；

有个指向派生类对象的基类指针: man

当使用以下语句

data.read( reinterpret_cast< char * >( man ),sizeof( *man));

后，

man不能调用那个虚函数，因为它的指向虚函数列表的指针值是错误的值，是无法计算的值

怎么解决这个问题呢？

我琢磨着通过取一个可用的指向虚函数列表的指针值对man里的指针进行赋值...

这样能行么？

 

Answer 1

不需要把所有都序列化。只对那些成员变量序列化就好了。你可以通过在构造函数中传入序列化来恢复成员变量。

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麻烦把正确答案设为解答。

Answer 2

Serialization: Making a Serializable Class

Five main steps are required to make a class serializable. They are listed below and explained in the following sections: Deriving your class from CObject (or from some class derived from CObject). Overriding the Serialize member function. Using the DECLARE_SERIAL macro in the class declaration. Defining a constructor that takes no arguments. Using the IMPLEMENT_SERIAL macro in the implementation file for your class. If you call Serialize directly rather than through the >> and << operators of CArchive, the last three steps are not required for serialization.

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Visual C++ enthusiast, like network programming and driver development. At present is being engaged in the WinCE/Windows Mobile platform embedded development.

Answer 3

也就是说我必须要用序列化的只是才能达到目的了？

用非序列化的方式能行么？