说明：  一、目的要求 1、用高级语言编写和调试一个简单的文件系统，模拟文件管理的工作过程。从而对各种文件操作命令的实质内容和执行过程有比较深入的了解。 2、要求设计一个 n个用户的文件系统，每次用户可保存m个文件，用户在一次运行中只能打开一个文件，对文件必须设置保护措施，且至少有Create、delete、open、close、read、write等命令。
(First, the purpose of the requirements 1, with high-level language writing and debugging a simple file system, simulating the working process of document management. Thus a variety of file operations command of the substance and implementation of the process better. 2, requested the design of a n-user s file system, each user can be stored m documents, the user in an operation can only open a file, the file must be set up protective measures, and at least Create, delete, open, close, read, write and so on command.)