Consider building a hash of all 256 possible strings.

#!/usr/bin/perl
use strict;

my %convert=();
my %char = (
  '00'=>'a', '01'=>'b',
  '10'=>'c', '11'=>'d',
);
for my $n (0..255){
  my $bin = sprintf "%08b",$n;
  (my $str = $bin) =~ s/(..)/$char{$1}/eg;
  $convert{$str} = int $bin;
}

for ( qw( aaaa abcd dcba abab cdcd abba caab dddd) ){
  print $_.' '.$convert{$_}."\n";
}

[download]
poj

In reply to Re: convert each character of a string to number by poj
in thread convert each character of a string to number by Lowry76

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.