//81.Press any switch & display that number. Ex: 1 - > 1, 2 ->2, … 8 -> 8,9 -> 9,0 -> 0.

void setup() {
 volatile char *ddrf,*ddrk,*ddra,*outf,*ink,*outa,*ddrc,*outc;
 volatile uint32_t i,x,j,v,k,l;
 ddrf=0x30;ddrk=0x107;ddra=0x21;ddrc=0x27;outf=0x31;ink=0x106;outa=0x22;outc=0x28;
 *ddrf=0xff;*ddrk=0x00;*ddra=0xff;*ddrc=0xff;
 volatile char arr[]={6,91,79,102,109,125,7,127,111,63};
 while(1){
  x=0;
  for(i=1;i<=8;i=i*2){
    *outf=i;
    if(i==2){
      x=3;
    }if(i==4){
      x=6;
    }if(i==8){
      x=9;
    }
    for(v=x,j=1;v<3,j<=4;v++,j=j*2){
      if(*ink==j){
           if(v==10&&*ink==2){
          *outa=arr[9];
          for(k=0;k<20000;k++);
          break;
        } else if(v==9){
          continue;
        }else if(v==11){
          continue;  
        }
      *outa=arr[v];
       for(k=0;k<20000;k++);
          }
        }
      }
    } 
  }

void loop() {
  // put your main code here, to run repeatedly:

}