圆形插补，实用的插补程序，直线插补的起点为（0，0）点，终点为（-50，80）。下面分别是步长为1，0.5，0.1的程序。-Circular interpolation, interpolation procedures practical, linear interpolation of the starting point for the (0,0) point, end point (-50,80). Here are the steps of 1,0.5,0.1 procedures.