save project

snake.py

@@ -27,7 +27,7 @@ while True:
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
-        if event.type == locals.KEYDOWN:
+        elif event.type == locals.KEYDOWN:
             if event.key==locals.K_RIGHT and satheading != 'left':
                 setheading='right'
                 snake_head=right
@@ -41,15 +41,14 @@ while True:
                 setheading='down'
                 snake_head=down
     
-    x+=30
     if satheading=='right':
-        X += 30
-    if satheading=='left':
-        X -= 30
-    if satheading=='up':
-        Y += 30
+        x += 30
+    elif satheading=='left':
+        x -= 30
+    elif satheading=='up':
+        y -= 30
     else:
-        X -= 30   
+        y += 30   
     position.append((x,y))
     position.pop(0)
     # 将背景图画上去
@@ -67,4 +66,4 @@ while True:
     screen.blit(food, (360, 300))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
+    FPSCLOCK.tick(3)
\ No newline at end of file