save project

snake.py

@@ -71,12 +71,16 @@ while True:
     info="Score: " + str(score) 
     text=font.render(info,True,(0,0,0))
     screen.blit(text,(530,0))
+    if x<0 or x>630 or y<0 or y>450:
+        exit()
     
     # 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])
+        if (x,y)==position[i]:
+            exit()
     # 刷新画面
     screen.blit(food, (apple_x,apple_y))
     pygame.display.update()