用C 语言实现的对于凸包问题的求解。实现了基本的功能，代码量很少采用插值算法，先生成四个原始点，之后判断其他点-Using C language for the convex hull of the solution of the problem. To achieve the basic function of the volume of rarely used code interpolation algorithm, the original Mr. into four points, after the judge the other points