save project

snake.py

@@ -54,6 +54,7 @@ while True:
         y += 30
     position.append((x, y))
     position.pop(0)
+    score+=10
     if x == apple_x and y == apple_y:
         apple_x = random.randint(0,630)
         apple_y = random.randint(0,460)
@@ -61,8 +62,11 @@ while True:
         num2 = random.randint(1,16)
         apple_x = 30*num1-30
         apple_y = 30*num2-30
+        score+=10
     else:
         position
+    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