说明：  在VC的环境下，用C++实现A*算法和双向A*算法，并且能够通过设置不同的参数随机产生以邻接表存储网络图，从而可以对不同启发策略的A*算法进行测试和实验。
(in VC environment, the C achieving A* algorithm and the two-way A* algorithm, and through a variety of parameters to generate random adjacent table storage network map, thus inspired strategy to different A* algorithm tests and experiments.)