c++开发虚拟文件系统，支持用户管理，权限设置，虚拟系统与本机磁盘系统间的导入与导出功能，该系统拥有磁盘格式化，目录，文件创建，浏览，编辑，删除，等功能-C++ development of a virtual file system, support for user management, permissions settings, import and export functions of virtual system and the unit disk system, this sys