文件系统模拟程序设计一个 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。-File system simulation program to design an n-user file system, each user can be stored m file, the user in an operation can only open a file, the file must be set protection measures, and at least have Create, delete, open, close , read, write and other commands.