小弟新手一枚，最近在学习普中科技推出的一款51的单片机开发板，在点亮静态数码管的时候遇到一个问题，程序一与程序二编译均无报错，程序一能够点亮数码管，但是我将P0口用sbit定义成led后，就不能点亮数码管了，请各位大虾为小弟指点迷津，谢谢一：#include "reg51.h"
typedef unsigned char u8;
typedef unsigned int u16;
u16  smgduan[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xff};
  void main()
{
   P0=smgduan[0];
   while (1)
   {}
}

二：#include "reg51.h"
typedef unsigned char u8;
typedef unsigned int u16;
sbit led=P0;
u16  smgduan[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xff};
  void main()
{
  led=smgduan[0];
   while (1)
   {}
}