动画屏保，一个图标有十几个实例在屏幕中游动，遇到边界即反弹！可以作为屏保的参考实例。-animated screensavers, icons have a dozen examples of the screen cursor, which encountered the border rebound! The screensaver can be used as reference case.

一个控制台的字符控制显示程序.实现随机字符的反弹效果-A control console display program of the characters. The realization of the rebound effect of random characters