实现将单片机IO口输出顺序倒置的C程序（如将P0.0、P0.1、P0.2、P0.3、P0.4、P0.5、P0.6、P0.7的输出顺序变为P0.7、P0.6、P0.5、P0.4、P0.3、P0.2、P0.1、P0.0）-To achieve the MCU IO Port C output order inverted program (such as P0.0, P0.1, P0.2, P0.3, P0.4, P0.5, P0.6, P0.7 output sequence becomes P0