写个贪吃蛇的游戏

以下是一个简单的贪吃蛇游戏的示例代码：

import pygame
import time
import random

pygame.init()

white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)

display_width = 800
display_height = 600

game_display = pygame.display.set_mode((display_width, display_height))
pygame.display.set_caption('贪吃蛇')

clock = pygame.time.Clock()

snake_block = 20
snake_speed = 10

font_style = pygame.font.SysFont(None, 50)
score_font = pygame.font.SysFont(None, 35)


def our_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(game_display, green, [x[0], x[1], snake_block, snake_block])


def message(msg, color):
    mesg = font_style.render(msg, True, color)
    game_display.blit(mesg, [display_width / 6, display_height / 3])


def game_loop():
    game_over = False
    game_close = False

    x1 = display_width / 2
    y1 = display_height / 2

    x1_change = 0
    y1_change = 0

    snake_List = []
    Length_of_snake = 1

    foodx = round(random.randrange(0, display_width - snake_block) / 20.0) * 20.0
    foody = round(random.randrange(0, display_height - snake_block) / 20.0) * 20.0

    while not game_over:

        while game_close == True:
            game_display.fill(black)
            message("游戏结束！按 Q-退出或 C-重新开始", red)
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    game_over = True
                    game_close = False
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False
                    if event.key == pygame.K_c:
                        game_loop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x1_change = -snake_block
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_block
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_block
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_block
                    x1_change = 0

        if x1 >= display_width or x1 < 0 or y1 >= display_height or y1 < 0:
            game_close = True
        x1 += x1_change
        y1 += y1_change
        game_display.fill(black)
        pygame.draw.rect(game_display, red, [foodx, foody, snake_block, snake_block])
        snake_Head = []
        snake_Head.append(x1)
        snake_Head.append(y1)
        snake_List.append(snake_Head)
        if len(snake_List) > Length_of_snake:
            del snake_List[0]

        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True

        our_snake(snake_block, snake_List)

        pygame.display.update()

        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, display_width - snake_block) / 20.0) * 20.0
            foody = round(random.randrange(0, display_height - snake_block) / 20.0) * 20.0
            Length_of_snake += 1

        clock.tick(snake_speed)

    pygame.quit()


game_loop()

这是一个使用Pygame库编写的贪吃蛇游戏。在游戏中，玩家控制一条蛇，通过键盘上的箭头键来控制蛇的移动方向。目标是吃到屏幕上随机生成的食物，每吃一个食物，蛇的长度会增加。如果蛇撞到屏幕边缘或自己的身体，则游戏结束。游戏结束后，玩家可以选择重新开始或退出游戏