This is my code ,but the problem is that i am missing few lines between couple of same patterns. 
print"enter the input directory path:\n";
chomp($indir=<STDIN>);

print"enter the output directory name:\n";
chomp($outdir=<STDIN>);
if ($indir eq $outdir)
{
print"you cannot have same input and ouput directory please change:\n"
+;
exit();
}


else{
chdir ("$indir") or die "$!";
opendir(DIR,".") or die "$!";
my @files=readdir DIR;
print @files;
close DIR;
foreach $file(@files)
{

unless (($file eq ".") || ($file eq "..") )
{
$filer="$indir/$file";
open filein,$filer;
while (<filein>)

{
if(/(\d\_)+a1/.../(\d\_)+a1/)

{
print;
$var3="$outdir/$1 +to+ $2.txt";
open filew,">>$var3" or die "cannot open $out:$!";
print filew $_,"\n";


}

}

}
}
print"<----------------------------------------------->\n";
print "\t\t action done\n";
print "\a";
print "\a";
print "\a";
print"<----------------------------------------------->\n";
print"Results could be found in $outdir as txt files with TC name\n";
print"<**********************..............*************************>>
+\n";
close $out;
}

[download]
Am a novice to programming..need strong basic inputs. Thanks,

In reply to Re^2: extraction of text between 2 similar patterns in a text file by seek_m
in thread extraction of text between 2 similar patterns in a text file by seek_m

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.