ScreenSaver, much graphic object

一个数字雨的屏保，里面有一些随机生成字母或数字的算法。-A digital rain screensaver, there are some randomly generated letters or numbers of the algorithm.

这是个基于控制台应用程序开发简易钟表运行程序，黑底白字，模仿windows系统屏保时钟制作-This is a simple console application development watches to run the program based on, black bottom mispronounced character, imitation windows screensaver clock making