python字符型五子棋人机对战

下面是一个使用 Python 实现的五子棋人机对战的示例代码：

import random

def draw_board(board):
    """绘制棋盘"""
    for i in range(len(board)):
        print(' '.join(board[i]))

def get_computer_move(board, computer_letter):
    """获取电脑下棋的位置"""
    # 查找是否存在获胜的位置
    for i in range(len(board)):
        for j in range(len(board[i])):
            if board[i][j] == ' ':
                board[i][j] = computer_letter
                if is_winner(board, computer_letter):
                    return (i, j)
                board[i][j] = ' '
    # 防守玩家获胜的位置
    player_letter = 'X' if computer_letter == 'O' else 'O'
    for i in range(len(board)):
        for j in range(len(board[i])):
            if board[i][j] == ' ':
                board[i][j] = player_letter
                if is_winner(board, player_letter):
                    return (i, j)
                board[i][j] = ' '
    # 随机下棋
    while True:
        i = random.randint(0, len(board) - 1)
        j = random.randint(0, len(board[i]) - 1)
        if board[i][j] == ' ':
            return (i, j)

def is_winner(board, letter):
    """判断是否存在获胜的位置"""
    # 检查行
    for i in range(len(board)):
        if board[i][0] == letter and board[i][1] == letter and board[i][2] == letter and board[i][3] == letter and board[i][4] == letter:
            return True
    # 检查列
    for j in range(len(board[0])):
        if board[0][j] == letter and board[1][j] == letter and board[2][j] == letter and board[3][j] == letter and board[4][j] == letter:
            return True
    # 检查正对角线
    if board[0][0] == letter and board[1][1] == letter and board[2][2] == letter and board[3][3] == letter and board[4][4] == letter:
        return True
    # 检查反对角线
    if board[0][4] == letter and board[1][3] == letter and board[2][2] == letter and board[3][1] == letter and board[4][0] == letter:
        return True
    return False

def is_board_full(board):
    """判断棋盘是否已满"""
    for i in range(len(board)):
        for j in range(len(board[i])):
            if board[i][j] == ' ':
                return False
    return True

def main():
    # 初始化棋盘
    board = [[' ' for j in range(5)] for i in range(5)]
    draw_board(board)
    # 玩家执X，电脑执O
    player_letter = 'X'
    computer_letter = 'O'
    while True:
        # 玩家下棋
        row = int(input('请输入行号(0-4)：'))
        col = int(input('请输入列号(0-4)：'))
        if board[row][col] == ' ':
            board[row][col] = player_letter
        else:
            print('该位置已经下过了，请重新输入！')
            continue
        draw_board(board)
        # 判断是否获胜
        if is_winner(board, player_letter):
            print('恭喜，你获胜了！')
            break
        # 判断是否棋盘已满
        if is_board_full(board):
            print('平局！')
            break
        # 电脑下棋
        row, col = get_computer_move(board, computer_letter)
        board[row][col] = computer_letter
        draw_board(board)
        # 判断是否获胜
        if is_winner(board, computer_letter):
            print('很遗憾，电脑获胜了！')
            break
        # 判断是否棋盘已满
        if is_board_full(board):
            print('平局！')
            break

if __name__ == '__main__':
    main()

这个程序中，使用一个二维数组 `board` 来表示棋盘，`'X'` 表示玩家棋子，`'O'` 表示电脑棋子，`' '` 表示空位。

在 `get_computer_move` 函数中，首先查找是否存在获胜的位置，如果存在则返回该位置；如果不存在，则防守玩家获胜的位置；最后，如果都没有找到，则随机下棋。

在 `is_winner` 函数中，检查是否存在获胜的位置，如果存在则返回 `True`，否则返回 `False`。

在主函数 `main` 中，先让玩家下棋，再让电脑下棋，直到某一方获胜或者棋盘已满。