编写程序，实现人机交互的3*3井字棋。玩家决定画○或画×，电脑随机位置下棋子。

好的，这是一个简单的井字棋游戏的 Python 代码：

import random

board = [' '] * 9
player = 'X'
computer = 'O'

def draw_board():
    print('-------------')
    print('| ' + board[0] + ' | ' + board[1] + ' | ' + board[2] + ' |')
    print('-------------')
    print('| ' + board[3] + ' | ' + board[4] + ' | ' + board[5] + ' |')
    print('-------------')
    print('| ' + board[6] + ' | ' + board[7] + ' | ' + board[8] + ' |')
    print('-------------')

def get_player_move():
    move = input('Enter your move (1-9): ')
    while move not in ['1', '2', '3', '4', '5', '6', '7', '8', '9'] or board[int(move) - 1] != ' ':
        move = input('Invalid move. Enter your move (1-9): ')
    return int(move) - 1

def get_computer_move():
    possible_moves = []
    for i in range(9):
        if board[i] == ' ':
            possible_moves.append(i)
    return random.choice(possible_moves)

def check_win(player):
    if (board[0] == player and board[1] == player and board[2] == player) or \
       (board[3] == player and board[4] == player and board[5] == player) or \
       (board[6] == player and board[7] == player and board[8] == player) or \
       (board[0] == player and board[3] == player and board[6] == player) or \
       (board[1] == player and board[4] == player and board[7] == player) or \
       (board[2] == player and board[5] == player and board[8] == player) or \
       (board[0] == player and board[4] == player and board[8] == player) or \
       (board[2] == player and board[4] == player and board[6] == player):
        return True
    else:
        return False

def main():
    global board
    draw_board()
    while True:
        move = get_player_move()
        board[move] = player
        draw_board()
        if check_win(player):
            print('You win!')
            break
        if ' ' not in board:
            print('Tie!')
            break
        move = get_computer_move()
        board[move] = computer
        draw_board()
        if check_win(computer):
            print('Computer wins!')
            break

if __name__ == '__main__':
    main()

这个程序实现了一个简单的人机交互的井字棋游戏，玩家可以选择画○或画×，电脑会随机下棋子。