Your lexical 'my $opt_i' is masking the package $opt_i that Getopt::Std creates.

Use 
use Getopt::Std;
use strict;

use vars qw/$opt_i/;
getopt('i');

print "Increment value is $opt_i\n";

[download]


grep
grep> cd pub
grep> more beer

In reply to Re: Using getopt by grep
in thread Using getopt by idunno

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