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 magnification, narrow, and the screen translation, from functional.