贪吃蛇游戏

import pygame
import random

# 初始化 Pygame 库
pygame.init()

# 游戏窗口的大小
window_width = 800
window_height = 600

# 创建游戏窗口
game_window = pygame.display.set_mode((window_width, window_height))

# 游戏窗口的标题
pygame.display.set_caption('贪吃蛇游戏')

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

# 定义蛇的大小和速度
snake_block_size = 10
snake_speed = 15

# 定义字体
font_style = pygame.font.SysFont(None, 50)


# 显示分数
def show_score(score):
    score_font = font_style.render("Score: " + str(score), True, white)
    game_window.blit(score_font, [0, 0])


# 画蛇
def draw_snake(snake_block_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(game_window, green, [x[0], x[1], snake_block_size, snake_block_size])


# 游戏主循环
def game_loop():
    game_over = False
    game_close = False

    # 蛇的初始位置
    x1 = window_width / 2
    y1 = window_height / 2

    # 蛇的移动方向
    x1_change = 0
    y1_change = 0

    # 蛇的长度
    snake_list = []
    Length_of_snake = 1

    # 随机生成食物的位置
    foodx = round(random.randrange(0, window_width - snake_block_size) / 10.0) * 10.0
    foody = round(random.randrange(0, window_height - snake_block_size) / 10.0) * 10.0

    # 游戏循环
    while not game_over:

        # 游戏结束
        while game_close:
            game_window.fill(black)
            message = font_style.render("Game Over!", True, red)
            game_window.blit(message, [window_width / 3, window_height / 3])
            show_score(Length_of_snake - 1)
            pygame.display.update()

            # 按下 Q 键退出游戏，按下 C 键重新开始游戏
            for event in pygame.event.get():
                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()

        # 判断按键事件
        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_size
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_block_size
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_block_size
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_block_size
                    x1_change = 0

        # 判断蛇是否撞墙
        if x1 >= window_width or x1 < 0 or y1 >= window_height or y1 < 0:
            game_close = True

        # 更新蛇的位置
        x1 += x1_change
        y1 += y1_change

        # 游戏窗口背景色
        game_window.fill(black)

        # 画出食物
        pygame.draw.rect(game_window, red, [foodx, foody, snake_block_size, snake_block_size])

        # 将蛇的位置加入蛇的列表中
        snake_head = []
        snake_head.append(x1)
        snake_head.append(y1)
        snake_list.append(snake_head)

        # 如果蛇的长度大于 Length_of_snake，则删除列表中的第一个元素
        if len(snake_list) > Length_of_snake:
            del snake_list[0]

        # 判断蛇是否吃到食物
        for x in snake_list[:-1]:
            if x == snake_head:
                game_close = True

        # 画出蛇
        draw_snake(snake_block_size, snake_list)

        # 显示分数
        show_score(Length_of_snake - 1)

        # 更新游戏窗口
        pygame.display.update()

        # 如果蛇吃到食物，则增加蛇的长度，并重新生成食物的位置
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, window_width - snake_block_size) / 10.0) * 10.0
            foody = round(random.randrange(0, window_height - snake_block_size) / 10.0) * 10.0
            Length_of_snake += 1

        # 控制蛇的速度
        clock = pygame.time.Clock()
        clock.tick(snake_speed)

    # 退出 Pygame 库
    pygame.quit()

    # 退出 Python 解释器
    quit()


# 运行游戏主循环
game_loop()