说明：  本程序模拟一个机器人躲避障碍的仿真.其中有不完善的地方 迫于精力有限,具体过程还有点粗糙,读者可以加以修正
(a simulation of the robot avoid obstacles to the simulation. Which forced the inadequacies in the energy are limited, There is a process in concrete rough, and readers can be amended)