Check perlre's "Capture buffers". Also Use strict warnings and diagnostics or die!

use strict;
use warnings;

my $a = 'a.txt';
open(my $in ,'<', $a) || die "cannot open $a for reading: $!";
my $b = 'time.txt';
open (my $out,">>$b") || die "cannot create $b: $!";
while (<$in>) {
    # read a line from file $a into $_ 
    #print $out $_;
    if (/(returns \d{1} \(in \d{1}.\d{6} secs)/) {
        ## use capturing
        print $out $1."\n" ;
    }
    
} 
close($in)    || die "can't close  $a:$!"; 
close($out) || die "can't close  $b:$!";

[download]
Just a something something...

In reply to Re: Print the matched pattern by BioLion
in thread Print the matched pattern by kingjamesid

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.