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. leaked into not know where to go, from the main program but were then dug this part, we hope that understanding)