这里设计和实现了一个人机对下的五子棋程序，采用了博弈树的方法，应用了剪枝和最大最小树原理进行搜索发现最好的下子位置。介绍五子棋程序的数据结构、评分规则、胜负判断方法和搜索算法过程。-here Design and Implementation of a crew of 331 under the procedures adopted Game tree, Application of pruning trees and the largest and most principle Search Now found that the best location. 331 procedures on the data structure, score rules, the outcome judgment methods and search algorithm.