一个字符菜单的接口界面，其功能是能根据用户的选择，运行相应的程序模块，实现诸如改名文件、删除文件、显示文件等功能。-A character menu interface, interface, and its function is according to the user' s choice, run the corresponding program modules to achieve, such as renaming files, delete files, display files and other functions.