Hi i've got 2 txt files. 1. 
John, Kowalski, 34267
Eve, Nowak, 11232
Theodor, McNack, 3423

[download]
2.
11232, 5.0
55342, 2.0
3423, 3.5

[download]
What do i need to do is: 
Exam results:
1. Eve Nowak  5.0
2. Theodor McNack 3.5
absent:
1. John Kowalski
unidentified:
1. 55342

[download]
As you can see in first text file i've got students with their numbers and in the second one i've got grades and numbers. What i need to do is sth like this: 
#!/usr/bin/perl -w
 

$students = $ARGV[0];
$results = $ARGV[1];
open my $fh, '<', $students;

while(<$fh>)
{
@def = split /,/, $_;
chomp(@def1);
print "@def";
}
open my $fg, '<', $results;

while(<$fg>){
@def1=split /,/,$_;
chomp(@def1);
print "@def1";
}

close($fg);
close($fh);

[download]
I've written so far this code but i really don't know how to solve this task.

In reply to 2 txt files comparison and sorting by keltan

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.