解矩阵的程序~机电同学的一个作业~~挺有趣的，由于解完后是用图像显示出来~所以也可以学到图像函数~建议用Win-TC跑-Solution matrix of the process ~ E & M students a job ~ ~ quite interesting, because of exhausted solution is to use the image displayed images ~ so it can learn the function ~ is propos