用C#编程语言完成点与线的位置判断的算法程序。实现输入多个点后和一段线后能够自动判断出点在线的哪一侧，并且判断点的射线与该线是否有交点。-Using C# programming language and the completion point line position determination algorithm program. Realization enter multiple points and after a line can automatically determine