Please help, I am trying to compare 2 files to output: - What is in the second file that is not in the first - What is in the first file but not in the second. - What are the duplicates between the 2 files The below is all I have but it is proving damn difficult. Any help would be great! 
#!/usr/bin/perl -w
#use strict;


$file1= "StatusRegs.txt";
$file2 = "RegsUNQ.txt";

open (ONE, $file1) or die "Couldn't open $file1: $!\n";
open (TWO, $file2) or die "Couldn't open $file2: $!\n";

while ($line1 = <ONE>) { 


    $line2 = <TWO>; 


    if ($line1 ne $line2) {  
        print "$line1 does not equal $line2 at line $.\n"; 
    } else {
        print "$line1 is the same in both files at line $.\n";
    }
}

[download]

In reply to Comparing 2 files without diff or compare by ilottl

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.