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

简单的A＊算法．．都是．．．．可以用vs２０１３编绎(Simple A* algorithms... are all... can be deduced with vs2013)