#!usr/bin/perl


use strict ;
use warnings ;



my %hash = {'perl' => 1 , 'C' => 0} ;
foreach my $key(sort keys %hash)
{
 	print "$key : $hash{$key} \n" ;

		}

##</code><code>##

Reference found where even-sized list expected at perl.pl line 9.
Use of uninitialized value $hash{"HASH(0x98bf7ec)"} in concatenation (.) or string at perl.pl line 12.
HASH(0x98bf7ec) :