五子棋是一种深受大众喜爱的棋牌类小游戏，其规则简单，变化多端，非常富有趣味性。这里设计和实现双人对下的五子棋程序。-Backgammon is a popular chess game, the rules are simple, varied and very interesting. Here is the design and implementation of double under Gobang procedures.