说明：  MatLab 几个GUI界面的切换，很简单原理很好理解，会了一个多个就不成问题了，下载后需要建立俩个GUI名字为wenjian和Help_gui.
(Switching MatLab several GUI interface, very simple principle well understood, would be a more than one is not a problem, after downloading the need to establish both a GUI named wenjian and Help_gui.)