save project

snake.py

@@ -30,12 +30,14 @@ setheading = "right"
 snake_head = right
 
 while True:
-    a=random.randint(0,10)
+    a=random.randint(2,5)
     
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
+            print("您已退出")
             exit()
+            
         if event.type == locals.KEYDOWN:
             if event.key == locals.K_RIGHT and setheading != "left":
                 setheading = 'right'
@@ -66,6 +68,15 @@ while True:
         score+=10
     else:
         position.pop(0)
+    if x<0 or x>630 or y<0 or y>450:
+        print('您撞到了边框')
+        exit()
+        
+    if position[-1] in position[:-1]:
+        print('您撞到了自己')
+        exit()
+        
+        
     # if (apple_x,apple_y) in position[:len[position]-2]:
     #     apple_x=(random.randint(0,630))//30*30
     #     apple_y=(random.randint(0,450))//30*30
@@ -76,7 +87,6 @@ while True:
     # 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, (apple_x, apple_y))
     info='Score:'+str(score)