unsigned char B[10]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6};
unsigned char ones , tens;
  unsigned char i;
void main()
{  //portc is الأحاد
trisb=0;
trisc=0;
start:
portb=0x60;
portc=0xb6;


   continu:
  if(portc==0xf6) { portc=0xfe; delay_ms(1000);}
  if(portc==0xfe) { portc=0xe0; delay_ms(1000);}
  if(portc==0xe0) { portc=0xbe; delay_ms(1000);}
  if(portc==0xbe) { portc=0xb6; delay_ms(1000);}
  if(portc==0xb6) { portc=0x66; delay_ms(1000);}
  if(portc==0x66) { portc=0xf2; delay_ms(1000);}
  if(portc==0xf2) { portc=0xda; delay_ms(1000);}
  if(portc==0xda) { portc=0x60; delay_ms(1000);}
  if(portc==0x60) { portc=0xfc; delay_ms(1000);}

  if(portb==0xfc ){
   goto start;   }
  else
     {
        for(i=0;i<=9;i++)
         {
           if(portb==B[i])
            { porta.f6=1; portb=B[i-1];
           portc=0xf6;
           goto continu;
           }
         }
     }

tens=1;
ones=5;

unsigned char B[10]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6};
unsigned char ones,tens;

void show(){portb=B[tens];
            portc=B[ones];
            delay_ms(1000);}
void main()
{
 start:
   trisb=0;trisc=0;
   tens=1;
   ones=5;
 m:
   show();                            //show ones and tens on seven segments
   if(ones==0&&tens==0){goto start;}  //if two seven_segment=0 goto starting of program
   if(ones==0){tens--;ones=9;show();}  //if ones =0 make ones=9 and subtract one from tens
   ones--;                            //count down
 goto m;
}

ones--;

if(ones==0){tens--;ones=9;show();}

 if(ones==0&&tens==0){goto start;}

unsigned char B[10]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6};
unsigned char ones,tens;
void show()
{
  portb=B[tens];
  portc=B[ones];
  delay_ms(1000);
}
void interrupt()
{
 while(portb.f0){}         //   debounce
begin:
 if(porta.f0)
 {     porta.f2=1;
      if(ones!=9) {porta.f3=1; ones++;}

       else
       {
          if (tens==9) {tens=0xff;}
            ones=0; tens++;
       }
       show();
 }
 else if (porta.f1)
 {
       if(ones!=0) {ones--;}
       else
       {
       if(tens==0){tens=10;}
        ones=9; tens--;
       }
        show();
 }
 else if (portb.f0)
 {

 }
 else {goto begin;}
}
void main()
{
intcon.f7=1; intcon.INTE=1;  //rb0 interrupt
adcon1=0x06;  trisa=0x03;    // porta 0,1 as switches
trisb=0x01; trisc=0;
start:
 tens=1;
 ones=5;
 test:
    show();
 if(tens==0 && ones==0) {goto start;}
 if(ones==0) {tens--;  ones=9 ;goto test;}
 ones--;
 goto test;