系统操作通过菜单的形式完成，包括：文件复制、文本文件显示、文件连接、文件目录显示、文件更名、文件删除、文本文件字节数统计内容、文件内容比较功能-System operation through the menu in the form of completion, including: file copy, text documents, file connections, file directory display, file rename, file delete, the text file statistics for the number of bytes the contents of the document comparison feature