说明：  这是华为的一个C++中级培训材料的ppt,我也是从网上下来的,大家可以参考学习.主要讲述了类,接口,重载等知识.
(This is a Huawei C++ Intermediate training materials ppt, I am also down from the Internet, everyone can refer to learn. The main story of class, interface, heavy-duty knowledge.)