写一段贪吃蛇游戏代码

抱歉，我是语言模型AI，无法实现代码，但是我可以提供Python的伪代码给你参考：

import pygame
import random

# 初始化游戏
pygame.init()

# 设置游戏界面尺寸
screen = pygame.display.set_mode((600, 600))

# 设置游戏标题
pygame.display.set_caption("Greedy Snake")

# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)

# 定义蛇和食物初始位置
snake_head_pos = [300, 300]
snake_body_pos = [[280, 300], [260, 300], [240, 300]]
food_pos = [random.randrange(1, 60) * 10, random.randrange(1, 60) * 10]

# 定义蛇的初始移动方向
direction = "RIGHT"

# 定义蛇的移动速度
snake_speed = 10

# 定义游戏时钟
clock = pygame.time.Clock()

# 定义字体
font = pygame.font.SysFont(None, 25)

# 定义游戏结束函数
def game_over():
    # 显示游戏结束信息
    msg = font.render("Game Over! Press Q to Quit or C to Play Again", True, red)
    screen.blit(msg, [150, 300])
    pygame.display.update()

    # 等待用户输入
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_q:
                    pygame.quit()
                    quit()
                if event.key == pygame.K_c:
                    game_loop()

# 定义游戏循环函数
def game_loop():
    # 定义全局变量
    global direction

    # 定义蛇的初始移动方向
    direction = "RIGHT"

    # 定义蛇和食物初始位置
    snake_head_pos = [300, 300]
    snake_body_pos = [[280, 300], [260, 300], [240, 300]]
    food_pos = [random.randrange(1, 60) * 10, random.randrange(1, 60) * 10]

    # 定义初始分数
    score = 0

    # 游戏循环
    while True:
        # 处理事件
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    direction = "LEFT"
                elif event.key == pygame.K_RIGHT:
                    direction = "RIGHT"
                elif event.key == pygame.K_UP:
                    direction = "UP"
                elif event.key == pygame.K_DOWN:
                    direction = "DOWN"

        # 移动蛇的身体
        for index in range(len(snake_body_pos) - 1, 0, -1):
            snake_body_pos[index] = list(snake_body_pos[index - 1])

        # 移动蛇的头部
        if direction == "RIGHT":
            snake_head_pos[0] += snake_speed
        elif direction == "LEFT":
            snake_head_pos[0] -= snake_speed
        elif direction == "UP":
            snake_head_pos[1] -= snake_speed
        elif direction == "DOWN":
            snake_head_pos[1] += snake_speed

        # 判断是否吃到食物
        if snake_head_pos == food_pos:
            food_pos = [random.randrange(1, 60) * 10, random.randrange(1, 60) * 10]
            score += 10
            snake_body_pos.append([0, 0])

        # 判断游戏是否结束
        if snake_head_pos[0] < 0 or snake_head_pos[0] > 590 or snake_head_pos[1] < 0 or snake_head_pos[1] > 590:
            game_over()
        for block in snake_body_pos[1:]:
            if snake_head_pos == block:
                game_over()

        # 绘制游戏界面
        screen.fill(black)
        pygame.draw.rect(screen, white, [food_pos[0], food_pos[1], 10, 10])
        for pos in snake_body_pos:
            pygame.draw.rect(screen, white, [pos[0], pos[1], 10, 10])
        pygame.display.update()

        # 控制游戏帧率
        clock.tick(20)

# 运行游戏
game_loop()

# 退出游戏
pygame.quit()
quit()