This code will not compile, it appears to be missing significant sections, ie, the beginnings of the two blocks you are ending with unmatched }. Please post working code.

my @lines = $file

will store the file name in the array. I suspect you actually want to read the lines out of the file into @lines.

foreach my $file (readdir DIR) 
{
  next unless -f $file;
  open my $in_fh, '<', $file; 
  my @lines = <$in_fh>;
  close $in_fh;
  # call subroutine here
}

[download]

You will probably want to call a subroutine where indicated to process @lines and write your output file, since your array will cease to exist once the foreach loop is finished.

Updated per below

1 Peter 4:10

In reply to Re: Have a multiple file in directory and want to manipulate in each files in incremental order. All the file have same value. by GotToBTru
in thread Have a multiple file in directory and want to manipulate in each files in incremental order. All the file have same value. by hemantjsr

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.