这是一个基于AStar算法,用于四国军旗中的工兵搜索!(以前这一块是单独写的,后来又加到的主程序中的,但那份不知道放到哪里去了,只好从主程序中再把这部分挖出来,希望大家谅解)-This is an algorithm based AStar, Four flag for the engineering Search! (previously it is a separate written, and subsequently were added to the main program. lea