Sounds like homework to me. Anyway, here's a program (reading from DATA) that will do what you want. Requires 5.8.1 with the defined-or patch. 
#!/usr/bin/perl

use strict;
use warnings;

while (<DATA>) {
    last if /AGF30/;
}
exit unless defined;

unless (/%/) {
    while (<DATA>) {
        last if /%/;
    }
}
exit unless defined;

my $ir_value = substr $_ => -10;

for my $c (1 .. 2) {
    no warnings 'misc';
    $_ = <DATA> err exit;
}

my $ysp_value = substr $_ => -10;

print "\$ir_value  = $ir_value";
print "\$ysp_value = $ysp_value";


__DATA__
one line
two line
three line
bla AGF30 foor
four line
feeble %  0123456789
one more
two more  ABCDEFGHIJ
end

[download]

Running this gives: 

$ir_value  = 123456789
$ysp_value = BCDEFGHIJ

[download]
(That's 10 characters, including the newline).

Abigail

In reply to Re: Simple parse of file - getting started by Abigail-II
in thread Simple parse of file - getting started by RickF71

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.