本人修改了很长时间，但是还不够全面，这个程序使用VC++编程，功能是可以读取DXF图形文件并显示-I changed a long time, but it is not comprehensive enough, this program uses VC++ programming, functions can read and display DXF graphic files

读取dxf文件，并利用opencv画出2D形状(Read the DXF file, and draw a 2D shape using OpenCV)