成组链接模拟unix文件系统 功能包括:3）文件的创建

文件的打开：

文件的读：

文件的写：文件关闭

删除文件

创建目录（建立子目录）

改变当前目录

列出文件目录

退出-simulation unix file system features include : 3) documents the creation of open document : document read : The paper wrote : File closed delete the file create directories (establishment of subdirectories) to change the current directory to withdraw from the directory list