说明：  与WINDOWS记事本界面相似，支持鼠标，因为记事本功能较多，可以根据自己的能力模拟出部分功能，文本编辑这部分功能必须实现，主要利用串的知识。 在此程序中，主要包含了添加、插入、删除、复制、剪切、粘贴、还有文件操作。
( Interface similar to Notepad with WINDOWS, mouse, because Notepad function more according to their ability to simulate some of the features, this part of the text editing functions to be achieved, the main advantage of the knowledge of the string. In this procedure, mainly includes the add, insert, delete, copy, cut, paste, and file operations.)