数字电压表的C语言程序

#include"reg51.h"
#define uint  unsigned int 
#define uchar unsigned char
sbit st=P2^5;
sbit eoc=P2^6;
sbit oe=P2^7;
sbit CLOCK=P2^4;
sbit p21=P2^1;
sbit p22=P2^2;
sbit p23=P2^3;
uchar code tab[]={0X3F,0X06,0X5B,0X4F,0X66,0X6D,0X7D,0X07,0X7F,0X6F};
void main(void)
{   uchar date;
    uchar b,s,g;
uchar i;
TMOD=0X02;
TH0=245;
TL0=0;
IE=0X82;
TR0=1;
while(1)
      {        st=0;
           st=1;
   st=0;
   for(i=0;i<20;i++);
   while(eoc==0);
   oe=0;
   b=date/100;
   s=(date-b*100)/10;
   g=date-b*100-s*10;