// Signal how many bytes we wrote
2 For points outside the convex hull, an acceptable solution is to find the closest point on the surface and determine the barycentric coordinates for that point instead. ↑
，详情可参考heLLoword翻译官方下载
对急需新增长点的长春高新来说，这无疑是根看似完美的 “新稻草”。
arr[j + gap] = arr[j];