一字棋游戏 该程序可实现人与计算机下棋的过程。根据人所下棋的位置，计算机通过学习与判断，来确定当前最优的下棋位置。-tic-tac-toe game Playing Rules: 1) X always goes first. 2) The Players alternate placing Xs and Os on the board until either (a) one player has four in a row horizontally, vertically