本程序可以实现画圆,直线,bezier曲线,矩形等图形,并且是用鼠标操作的,同时也可以实现图形的任意倍的放大,缩小,平移和清屏,退出功能.-this procedure can be achieved Circle, Line, bezier curves, rectangles and other graphics, and the mouse is used to operate, but also the realization of graphics arbitrary times ma