51单片机一段代码，编译不了，请帮忙看看怎么回事

#include<reg51.h>

#define uchar unsigned char;

#define uint unsigned int;

sbit S2=P3^4;

sbit S3=P3^5;

sbit S4=P3^6;

sbit S5=P3^7;

sbit dula=P2^6;

sbit wela=P2^7;

uchar i;

uchar code table[]=

{0x3f,0x06,0x5b,0x4f,

0x66,0x6d,0x7d,0x07,

0x7f,0x6f,0x77,0x7c,

0x39,0x5e,0x79,0x71};

void display(uchar i)

{

dula=1;

P0=table;

dula=0;

wela=1;

P0=0xfe;

wela=0;

}

void main()

{

if(S2==0)

  display(1);

if(S3==0)

  display(2);

if(S4==0)

  display(3);

if(S5==0)

  display(4);

}