程序实现，在平面上鼠标左键按下输入一些点，鼠标右键弹起计算平面上离散点的凸包。vc++实现的，方便快捷，对于凸包算法的理解大有益处-Procedures to achieve, in the plane by pressing the left mouse button to import some point, calculating the right mouse button up the plane of the convex hull of discrete points. vc++