I did the following:
use strict;

my $linein = 'jlla jldsfjlfj lfla (1\p=n-\5) fk (2) ljljj ljlfaufi  lf
+jlakfh (10, 11) lfjdlaj (10, 11\p=n-\15) ndsfdjksnk (2, 15, 16) dkhfa
+k';

my $lineout = 'jlla jldsfjlfj lfla (<lr=C1>1</lr>\p=n-\<lr=C5>5</lr>) 
+fk (<lr=C2>2</lr>) ljljj ljlfaufi  lfjlakfh (<lr=C10>10</lr>, <lr=C11
+>11</lr>) lfjdlaj (<lr=C10>10</lr>, <lr=C11>11</lr>\p=n-\<lr=C15>15</
+lr>) ndsfdjksnk (<lr=C2>2</lr>, <lr=C15>15</lr>, <lr=C16>16</lr>) dkh
+fak';

my $copy = $linein;
$copy =~ s!(\d+)!<lr=C$1>$1</lr>!g;

if ( $copy eq $lineout )
{
    print( "Success!\n" );
}
else
{
    print( "Failure!\n" );
}

[download]

So, to summarise, a regular expression that exactly matches the example you've provided is:

  $line =~ s!(\d+)!<lr=C$1>$1</lr>!g;

[download]

In reply to Re: small help with map function by monarch
in thread small help with map function by nganesh

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.