I have this, 
#!/usr/bin/perl
# uniq.pl: remove repeated lines.

use English;
use diagnostics;

$oldline = "";
$n = 0;
while ($line = <>) {

    unless ($line eq $oldline) {
     $n = $n + 1;
    print "  $n  $line";
    }

    $oldline = $line;

}

[download]

I know that this is not right, it prints out just a straight increment of the output lines. I think that I need to combine the process so that the count stops at the end of each set of lines which I can do, but I can't work out how to print only the single line along with the number?

Edit by BazB - add code tags.

In reply to Re^2: counting lines in perl by imhotep
in thread counting lines in perl by imhotep

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