C++ 有许多features（ abstract class， virtual deconstuctor，RTTI， virtual inheritance）完全用C 去模拟一个C++ 其实是很难。
下面列一个表，如何用C 去模拟C++的一些主要功能：
| Feature in C++ | Implemented in C |
| Class | structure |
| data member | data member |
| static_ data member | global member and link |
| membor function | function point |
| constructor function | global access entry |
| destructor function | x |
| access decorator | x |
| Inheritance | Composit |
| Ploymorphism | Overwite the function point |
| RTTI |
OK |
下面一个例子来自于 codeproject：
http://www.codeproject.com/KB/cpp/InheritancePolymorphismC.aspx