For some reason with the below code,I am not getting the options given on command line,every option has the value "1",any idea?

use Getopt::Long;
use Data::Dumper;
my %options = ();
#my %options = ('des' => \$des, 'a' => \$a, 'd' => \$d, 'r' => \$r, 'v
+' => \$v);
GetOptions (\%options, 'des', 'a', 'd', 'r', 'v');
print  Dumper( \%options );

OUTPUT:-
$VAR1 = {
          'v' => 1,
          'des' => 1,
          'a' => 1,
          'r' => 1,
          'd' => 1
        };
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