介绍程序设计实践的pdf文档。共九章。包括：第2章算法与数据结构，第3章设计与实现，第4章界面……具体内容可以参考目录文件。-on program design practice pdf file. A total of nine chapters. Include : Chapter 2 algorithm and data structure, Chapter 3 of the design and implementation of Chapter 4 interface ... can refer to the specific content of the catalog.