一个简单的图形处理系统，能够绘制简单的图形并进行编辑。包括：绘制直线、椭圆等简单图形，能够对图形进行平移、旋转、镜像等简单编辑。-A simple graphics processing systems, able to draw simple graphics and edit it. Include: Drawing a straight line, oval and other simple graphics, to the graphics translation, rotation,