编写程序，模拟混合索引形式的文件系统。能接收建立、删除、读、写和查询属性的命令，并在模拟文件系统中进行操作。提供一个可供操作者建立、删除、读、写文件和查看文件属性的交互界面-Programming, analog mixed-index form of file system. Established to receive, delete, read, write, and query attributes of command and the file system in a simulated operation. Available to provide an operator to establish, delete, read, write documents and view the file attributes interface