用C语言作为编程语言，用结构体作为文件和目录等的编程结构；对于文件，其结构体中包括文件名、属性、文件内容、文件长度、指向父目录的指针、指向子目录的指针、指向同层目录或文件的指针。 目录结构和文件结构相似，只是没有内容，其只有子目录和子文件。 用户结构包括用户名、指向其文件目录的指针、指向下一个用户的指针。设置的文件操作命令有17条：新建文件、新建目录、删除文件、删除目录、在当前目录下指定目录新建子目录、在当前目录下指定目录新建子文件、打开文件、关闭文件、读文件、写文件、修改文件名、修改目录名、修改文件属性、进入指定目录、返回父目录、显示当前目录的信息、显示当前所在目录的路径等。-C language as a programming language, the structure used as a file and directory structure of the program; The document, the body structure, including file name, attribute, the contents of the documents, document length, point to the parent directory pointer subdirectory pointer with directory or file level indicator . Directory structure and the structure of the document is similar, but no, and their only son and subdirectories document. Users structure includes user name, at its directory pointer under a user's guide. Set up in the paper commands a 17 : new document, the new directory, delete files, delete directory, the current directory specified directory new subdirectories in the current directory specified documents for the new directory, open the file, close the document, docum