#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P1^0;
sbit key2=P1^1;
sbit key3=P1^2;
uchar code table[]={0x05,0xF5,0x13,0x51,0xE1,0x49,0x09,0xD5,0x01,0x41};
void init();
void delay1ms();
void display(uchar,uchar,uchar,uchar);
void scankey();
uchar num1,num2,n1,n2,n3,n4,mark;
uint k=0;
uint a[10],b[10];
void main()
{
  init();
  while(1)
  {
    display(n1,n2,n3,n4);
	scankey();
  }
}


void init()
{
 TMOD=0x10;
 TH1=(65536-10000)/256;
 TL1=(65536-10000)%256;
 EA=1;
 ET1=1;
}
void delay1ms()
{
 uint i,j;
 for(i=1;i>0;i--)
   for(j=110;j>0;j--);
}
void display(uchar n1,uchar n2,uchar n3,uchar n4)
{ 
  n1=num1%10;
  n2=num1/10;
  n3=num2%10;
  n4=num2/10;
  P2=table[n1];P3=0x80;delay1ms();P2=0xff;
  P2=table[n2];P3=0x40;delay1ms();P2=0xff;
  P2=table[n3];P3=0x20;delay1ms();P2=0xff;
  P2=table[n4];P3=0x10;delay1ms();P2=0xff;
}
void scankey()
{
 if(key1==0)
 {
  while(!key1)
  {display(n1,n2,n3,n4);}
    mark++;
  if(mark==1)
  {
   TR1=1;
  }
  if(mark==2)
  {
   TR1=0;
   k=0;
  }
  if(mark==3)
  {
   mark=0;
   num1=0;
   num2=0;
   k=0;
   }
  }
  if(key2==0)
  {
   while(!key2)
   {display(n1,n2,n3,n4);}
   k++;
   a[k]=num1;
   b[k]=num2;
  }
  if(key3==0)
  {
  while(!key3)
  {display(n1,n2,n3,n4);}
  k++;
  num1=a[k];
  num2=b[k];
  if(k==10)
  k=0;
  }
}

void T1_time() interrupt 3
{
 TH1=(65536-10000)/256;
 TL1=(65536-10000)%256;
 num1++;
 if(num1==100)
 {
  num1=0;
  num2++;
  if(num2==60)
     num2=0;
 }

}