时分秒控制程序

#include <REGX51.H>
#define uchar unsigned char
#define  uint unsigned int
uchar code led[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
//uchar code led[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void delay();
uint msec,sec,fen,shi;
void int_0() interrupt 1
{  
    TH0=6;
 TL0=6;
 msec++;
 if(msec==4000)
 {
  msec=0;
  sec++;
  if(sec==60)
  {
   sec=0;
   fen++;
   if(fen==60){
   fen=0;
   shi++;
   if(shi==24)
   {
   shi=0;
   }
  }
     }
   }
} 
void main()
{
 TMOD=0x02;
 TH0=6;
 TL0=6;
 EA=1;
 ET0=1;
 TR0=1;
    while(1)
 {
 P0=0x20;
 P1=led[shi/10];
 delay();
 P0=0x10;
 P1=led[shi%10];
 delay();
 P0=0x08;
 P1=led[fen/10];
 delay();
 P0=0x04;
 P1=led[fen%10];
 delay();
 P0=0x01;
 P1=led[sec%10];
 delay();
 P0=0x02;
 P1=led[sec/10];
 delay();
 }
}
void delay()
{ uchar m;
 for(m=0;m<230;m++);
}