用A star算法来解决寻路问题，程序简单易实现。给定几种不同的地图进行验证，得到较优的路径-A star algorithm used to solve the routing problem, the procedure is simple and easy to achieve. Given several different maps to verify the path to be better

一个简单的A星寻路算法，该例子可以改变起始点，障碍物，终点的位置-A star with a simple routing algorithm, can change the position of the starting point of this example, the obstacle, the end of the