中文说明：可以进行圆锥的输出。用鼠标进行放缩，移动等操作。在窗口界面通过输入母线长度和角度，即可生成圆锥图形，方便简单。另外本人还有mfc程序界面来生成圆锥，稍后上传。经本人原创，可以使用
English Description：
The output of cone can be carried out. Use the mouse to zoom, move and other operations. By inputting the length and angle of generatrix in the window interface, the conic figure can be generated, which is convenient and simple. In addition, I also have MFC program interface to generate cone, which will be uploaded later. Original by myself, can be used