这是第五章的答案，这些都是我珍贵的代码，我学习c++的时候，一章一章的编出来的，不仅有课后题的答案，还有文档说明，非常详细，希望能帮到你们!-This is the fifth chapter of the answer, and these are my precious code, I learn c++ the when, a chapter of the series out, not only the answer to th