实现windows的fat16文件系统的模拟运行，可以实现文件夹的创建和删除、文件的创建和删除及多级目录的测试、可进行文件的打开、关闭与定位读写的模拟-The windows fat16 file system to achieve the simulation run, can create and delete folders, create and delete files and multi-level directory of the test, the file can be opened, read and write off the analog and positioning