A*算法是一种静态路网中求解最短路径最有效直接的搜索方法，也是许多其他问题的常用启发式算法，他考虑了全局的信息，可以在一些情况下蜕化为迪杰斯特拉算法以及扫描时算法，本程序文件是利用A*算法进行一个航路规划(A * algorithm is a static road network to solve the shortest path is the most effective and direct search method, is also a lot of other problems commonly used heuristic algorithm, he considered the global information, can be reduced to dijiestella algorithm in some cases and scanning algorithm, this program file is to use a * algorithm for a route planning)