参照 windows 的记事本程序，完成一个文本编辑软件，提示和要求如下：

①可以进行打开，关闭，新建，保存，另存为，等菜单操作。

②以上菜单均有相应的快捷键功能。

③关闭窗口时，如有修改而未保存的文件，弹出是否要保存的提示窗口。

④添加复制，粘贴，剪切等功能。

⑤标题栏显示文件名。-With reference to the Windows notepad program, completed a text editing software, prompt and requirements are as follows:



(1) to open and close, new, save, save as, such as menu operation.



(2) above have corresponding shortcut menu functions.



(3) close the window, if there are any changes and did not save the file, pop up whether to prompt window.



(4) add copy, paste, shear, etc.



5. The title bar shows the file name.