基于C++的圣诞礼物桌面现实，雪花飘洒等等，基于VS，代码简单明了效果清楚，易于学习-C++- based desktop real Christmas gift, snow drift, etc., based on the VS, the code is simple effect clear, easy-to-learn

Gift wrapping algorithm. The set of points defined by their coordinates. The program draws these points and the polygon of minimal area, covering all points.