save project

snake.py

@@ -61,6 +61,7 @@ while True:
     if x == apple_x and y == apple_y:
         apple_x = num_x*30-30
         apple_y = num_y*30-30
+        score += 1
     else:
         position.pop(0)
     # 将背景图画上去
@@ -78,6 +79,8 @@ while True:
     info = "Score" + str(score)
     text = my_font.render(info,True,(0,0,0))
     screen.blit(text,(540,10))
+    if x < 0 or x > 630 or y < 0 or y > 450:
+        exit()
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)