这个程序为经典的圆弧插补程序，可以走直线和弧线，设定好圆心坐标，圆弧的起点坐标和终点坐标，就可以走圆弧，非常简单，适合于初学者练习。-This program for a classic circular interpolation program, you can walk a straight line and arc, and set the center coordinates of the arc starting point coordinates and end coordinat