#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar temp,qian,bai,shi,ge,tt;
sbit weil=P2^1;
sbit dual=P2^0;
sbit qie=P3^4;
sbit jia=P3^5;
sbit jian=P3^6;
sbit fa=P3^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x76,0x73};
uchar code wela[]={0xfe,0xfd,0xfb,0xf7};
void delay(uint z);
void display(uint qian,uint bai,uint shi,uint ge);
void main()
{ while(1)
{
if (P3_4==0)
{



  TMOD=0x11;
  TH0=(65536-50000)/256;
  TL0=(65536-50000)%256;
  EA=1;
  ET0=1;
  TR0=1;
  tt=0;
  temp=111;
  while(1)
 { if (tt==10)
  {  tt=0;
    temp++;
   if (temp==125)
    {temp=0;}
   bai=temp/100;
   shi=temp%100/10;
   ge=temp%10;
   }
  display(bai,shi,ge);
 }
}
void display(uint qian,uint bai,uint shi,uint ge)
{
  weil=1;
  P0=0xfe;
  weil=0;
  dual=1;
  P0=table[qian];
  dual=0;
  delay(6);
  weil=1;
  P0=0xfd;
  weil=0;
  dual=1;
  P0=table[bai];
  dual=0;
  delay(6);
  weil=1;
  P0=0xfb;
  weil=0;
  dual=1;
  P0=table[shi];
  dual=0;
  delay(6);
  weil=1;
  P0=0xf7;
  weil=0;
  dual=1;
  P0=table[ge];
  dual=0;
  delay(6);
}
void delay(uint z)
{
  uint x,y;	    
    for(x=z;x>0;x--)
       for(y=1000;y>0;y--);
}
void timer0() interrupt 1
{
  TH0=(65536-1000)/256;
  TL0=(65536-1000)%256;
  tt++;
}
void timer1() interrupt 3
{
  TH0=(65536-1000)/256;
  TL0=(65536-1000)%256;
  tt++;
}