设计一个记事本，菜单中要求有文件，编辑，和帮助。文件中有新建、打开、保存和退出；编辑中有剪切、复制和粘贴；帮助中显示开发人和版本信息等信息 可以自由改动作者-Design a notepad, the menu requires a file, edit, and help. File a new, open, save and exit　editors have cut, copy and paste　help develop and display version information.