diff --git a/snake.py b/snake.py
index 537316e..2ca55ae 100644
--- a/snake.py
+++ b/snake.py
@@ -1,5 +1,6 @@
 import pygame
 from pygame import locals
+import random  #导入random模块
 
 # 初始化pygame，为使用硬件做准备
 pygame.init()
@@ -16,13 +17,16 @@ body = pygame.image.load('body.png')        # 身体
 left = pygame.image.load('left.png')        # 头 朝左
 up = pygame.image.load('up.png')            # 头 朝上
 down = pygame.image.load('down.png')        # 头 朝下
-
+my_font = pygame.font.Font("neuropol.ttf",18)
 x, y = 240, 120
 position = [(180, 90), (180, 120), (210, 120), (x, y)]
 
+apple_x = 360  #苹果的x坐标
+apple_y = 300  #苹果的y坐标
+
 setheading = "right"
 snake_head = right
-
+score = 0
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -52,7 +56,20 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+
+    if x == apple_x and y == apple_y:
+        num1 = random.randint(1,22) #横排第几个格子
+        num2 = random.randint(1,16) #竖排第几个格子
+        apple_x = num1 * 30 - 30
+        apple_y = num2 * 30 - 30
+        score += 10
+    else:
+        position.pop(0)
+
+
+    if x < 0 or x > 630 or y < 0 or y > 450:
+        exit()
+
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -62,7 +79,12 @@ while True:
         screen.blit(body, position[i])
 
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (apple_x, apple_y))
+
+    info = "Score:"+str(score)
+    text = my_font.render(info,True,(0,0,0))
+    screen.blit(text,(540,10))
+
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
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