用的分治法的思想,凸包顶点正好可以构成循环,感觉比较新颖,就是不断顺时针旋转,按照书上那个公式不断找出左边的点和顶点,不断存入到数组中,最后的输出刚好是顺时针的输出,创建了好几个数组,其中还有一个三维数组,用法比较特殊,无意间想到的-Ideological divide and conquer, the convex hull of the vertices can just constitute a cycle, feeling relatively new, is constantly rotate clockwise, in accordance with the formula in the book constantly find the left point and vertex, continuously stored into the array, the final output just clockwise output, create several arrays, which there is a three-dimensional array, use special inadvertently think