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。-with high-level language debugging and prepared a simple file system, simulated document management process. Thus the various documents in order to operate substance and the implementation process is more in-depth understanding.