说明：  设计模式精解－GoF 23种设计模式解析附C++源代码（中文版） 非影印版的pdf，很清晰， 很经典的设计模式书籍，可以配合GoF的设计模式看
(Design Pattern-GoF 23 refined solution designs attached analytic model C++ Source code (Chinese Version) non-photocopy version of the pdf, very clear, very classic design patterns book, you can tie in with the GOF design patterns to see)