In c language

. Given the length of three edges of the triangle, please design a program to judge the type of a triangle. And the types are right triangle, equilateral triangle, isosceles triangle or ordinary triangle. Input: the non-negative lengths of edges of a set of triangles. Each line specifies the lengths of three edges of each triangle, and lengths are less than 100. -1 means the end of the input. Output: the types of triangles. The types are Right Triangle," Equilateral Triangle," Isosceles Tri- angle, Ordinary Triangle" or "Not a triangle