参考教程中HASH文件的构造算法，设计一组HASH文件函数，包括HASH文件创建、打开、关闭、读、写等。

编写一个测试文件，通过记录保存、查找、删除等操作，检查上述HASH文件是否实现相关功能。

-HASH reference tutorial file construction algorithm, design a set of HASH file functions, including HASH file creation, open, close, read, write, and so on. Write a test file, by recording the save, search, delete, etc, check the HASH file is implementation dependent feature.