使用opengl函数写一个控制台程序，要求输出下列简单的二维图形：如线（实线、虚线）、四边形、多边形、圆等，并任意填充一个封闭图形

-Use opengl function to write a console program, require a simple two-dimensional graphical output of the following: If the line (solid line, dashed line), quadrilateral, polygon, round, etc., and any fill a closed graph