Scytale solver (awk)

13.3.2012 09:37 |

jednoduchy riesitel scytale sifry. spustenie:

echo "ENCODEDENCODED" | awk -v width=NNN -f scytale.awk

. priklad:

echo 'AIUBN.CUCLXZ' | awk -v width=3 -f scytale # output: ABCLINUXU.CZ

. aplikacie: geocaching (mystery caches)

#BEGIN {
#width=6
#}

{
for(i=1;i<=length;i++){
  a[i]=substr($0,i,1)
  }
}


END{
len=i/width
print "LENGTH is: "len
print "WIDTH is: "width
print "Decyphered text: "
for (j=1;j-1<width;j++){
 c=0
 pos=j
 while (pos < i){
   printf "" a[pos]
   c=c+1
   pos=j+c*width
  }
}
print
}

       

Komentáře

[Bystroushaak]

Pěkné :)