用C语言实现了Cohen-Sutherland算法，代码可以直接复制到tc里面运行，很好实现了线段裁剪-With the C language to implement Cohen-Sutherland algorithm, the code can be directly copied to the tc run inside, well realized Line Clipping

图形学用Sutherland-Hodgman算法进行多边形裁剪-Sutherland- with Hodgman algorithm polygon cropping