求加权平均分.很简单的一个小程序,我只想下载其他代码学习一下.被迫上载,以后会上传有用的源码,支持网站的发展.-seeking weighted average score. Very simple procedure, a small, I just want to download the code learn from this. Forced onto the set, There will be a useful source uploads, support the development of the website.