Python实现2048游戏步骤详解

import numpy as np
import random
<p>def init_board():
board = np.zeros((4, 4), dtype=int)
add_random_tile(board)
add_random_tile(board)
return board</p><p>def add_random_tile(board):
empty_cells = [(r, c) for r in range(4) for c in range(4) if board[r][c] == 0]
if empty_cells:
r, c = random.choice(empty_cells)
board[r][c] = 2 if random.random() < 0.9 else 4</p>

def merge_row_left(row):
    new_row = [i for i in row if i != 0]
    for i in range(len(new_row) - 1):
        if new_row[i] == new_row[i+1]:
            new_row[i] *= 2
            new_row[i+1] = 0
    new_row = [i for i in new_row if i != 0]
    return new_row + [0] * (4 - len(new_row))
<p>def move_left(board):
moved = False
for r in range(4):
old_row = board[r].copy()
board[r] = merge_row_left(board[r])
if not moved and not np.array_equal(old_row, board[r]):
moved = True
return moved</p>

def move_right(board):
    board_copy = board.copy()
    board[:] = np.fliplr(board)
    moved = move_left(board)
    board[:] = np.fliplr(board)
    return moved
<p>def move_up(board):
board_copy = board.copy()
board[:] = board.T
moved = move_left(board)
board[:] = board.T
return moved</p><p>def move_down(board):
board_copy = board.copy()
board[:] = np.fliplr(board.T)
moved = move_left(board)
board[:] = np.flipud(board).T
return moved</p>

def print_board(board):
    print("\n" + "-" * 20)
    for row in board:
        print(" ".join(f"{cell:4}" if cell != 0 else "    " for cell in row))
    print("-" * 20)
<p>def is_game_over(board):
if any(0 in row for row in board):
return False
for r in range(4):
for c in range(4):
if (r < 3 and board[r][c] == board[r+1][c]) or (c < 3 and board[r][c] == board[r][c+1]):
return False
return True</p><p>def main():
board = init_board()
while True:
print_board(board)
cmd = input("输入方向 (w/a/s/d) 或 q 退出: ").strip().lower()
if cmd == 'q':
print("退出游戏")
break
moved = False
if cmd == 'w':
moved = move_up(board)
elif cmd == 's':
moved = move_down(board)
elif cmd == 'a':
moved = move_left(board)
elif cmd == 'd':
moved = move_right(board)
else:
print("无效输入，使用 w/a/s/d")
continue</p><pre class="brush:python;toolbar:false;">    if moved:
        add_random_tile(board)
        if is_game_over(board):
            print_board(board)
            print("游戏结束！")
            break
    else:
        print("无法移动，请尝试其他方向")

if name == "main": main()