save project

snake.py

@@ -45,11 +45,11 @@ while True:
                 setheading = 'down'
                 snake_head = down
     if x==a_x and y==a_y:
-        a_x=random.randint(0,660)
-        a_y=random.randint(0,480)
-        pygame.display.update()
+        a_x=random.randint(0,33)*30
+        a_y=random.randint(0,16)*30
         screen.blit(food, (a_x, a_y))
-    # 设置贪吃蛇的头部坐标
+    # 苹果被吃后重新出现
+
     if setheading == "right":
         x += 30
     elif setheading == "left":
@@ -58,11 +58,14 @@ while True:
         y -= 30
     else:
         y += 30
+    #按键控制蛇移动
+
     position.append((x, y))
     position.pop(0)
-    # 将背景图画上去
+    # 将蛇头的图画上去
+
     screen.blit(background, (0, 0))
-    # 将贪吃蛇的头画上去
+    # 将背景图画上去
     screen.blit(snake_head, position[-1])
     # 将贪吃蛇的身体画上去
     for i in range(len(position)-1):