这是用V++编程实现的多边形编译器，可以画出任意的形状，以栅格为背景，且右击鼠标一下可以删除临近的点和线，双击右键，可完全删除已画的图形-V++ programming polygon compiler can draw any shape of the grid for the background, right-click the mouse can delete adjacent dots and lines, double-click the right can completely r