判断三个点是否能够构成直角三角形 1.无法构成三角形，即三点共线 输出They are in a line 2.可以构成三角形，但不是直角三角形，输出no 3.可以构成直角三角形，输出yes-Can be configured to determine whether the three points right triangle 1. can not form a triangle, that is collinear output They are in a line 2