auto save

snake.py

-import pygame
+import pygame,random
 from pygame import locals
 
 # 初始化pygame，为使用硬件做准备
@@ -22,7 +22,9 @@ position = [(180, 90), (180, 120), (210, 120), (x, y)]
 
 setheading = "right"
 snake_head = right
-
+apple_x,apple_y=120,240
+speed=5
+myfont = pygame.font.Font('neuropol.ttf',25)
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -41,6 +43,7 @@ while True:
             if event.key == locals.K_DOWN and setheading != "up":
                 setheading = 'down'
                 snake_head = down
+            
 
     # 设置贪吃蛇的头部坐标
     if setheading == "right":
@@ -52,17 +55,27 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+    if x == apple_x and y==apple_y:
+        apple_x=random.randint(0,21)*30
+        apple_y=random.randint(0,15)*30
+        speed+=1
+    else:
+        position.pop(0)
     # 将背景图画上去
+    if x<0 or x >630 or y< 0 or y>450:
+        exit()
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
     screen.blit(snake_head, position[-1])
+
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):
         screen.blit(body, position[i])
 
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (apple_x,apple_y))
+    myfont.render('Speed:'+str(speed),Ture,(0,0,0))
+    screen.blit(text,(0,10)
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(speed)
\ No newline at end of file