Try some <code> tags. 

#!/usr/bin/perl

# uniq.pl: remove repeated lines.

use strict;
use diagnostics;

$oldline = "";
$n = 1;

while ($line = <>) {
  if ($line eq $oldline) {
    #$n = $n + 1;
    $n++;
  } elsif ($oldline) {
    print " $n $oldline";
    $n = 1;
    $oldline = $line;
  }
}
if ($oldline)
{
  print " $n $line";
}

[download]
That should help. I'm not sure why you're using English. You should use strict. You always have a count of at least one - not zero. What we're doing now is checking - if the lines match, increment the count. If they don't match, print out the last match, and then reset. Finally, when we're done, we'll print out the last line.

Hope that helps.

(Warning - untested.)

Update: Of course, being untested, crashtest points out an obvious error... had $line when it should be $oldline.

In reply to Re^3: counting lines in perl by Tanktalus
in thread counting lines in perl by imhotep

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