#!/usr/bin/perl
use strict  ;
use warnings ;


foreach ( keys %{&testa} ) {
    print "key is $_\n" ;
}

sub testa {
    my $s = () ;
    $s->{'a'} = 10 ;
    $s->{'b'} = 20 ;
    $s->{'c'} = 30 ;

    return $s ;
}