摘要：
http://acm.hdu.edu.cn/discuss/public/post/reply.php?postid=2124&messageid=2&deep=1private bool intersect(double xa1, double ya1, double xa2, double ya2, double xb1, double yb1, double xb2, double yb2) { if (((xa2 - xa1) * (yb1 - ya1) - (xb1 - xa1) * (ya2 - ya1)) * ((xa2 - xa1) * (yb2 - ya1) 阅读全文
