You are passing an argument to the
new method, but not using it... Try
package shapes;
#constructor
sub new {
my ($invocant, %hash) = @_;
my $class = ref($invocant) || $invocant;
my $self = {
shape => $hash{'shape'},
};
return bless $self, $class;
}
sub print_shape {
my $self = shift;
print $self->{'shape'}->{'line1'} . "\n";
print $self->{'shape'}->{'line2'} . "\n";
print $self->{'shape'}->{'line3'} . "\n";
}
1;
Then use it like this :
use shapes;
my $box;
$box->{line1} = ' ---';
$box->{line2} = '| |';
$box->{line3} = ' ---';
my $box = shapes->new(shape => $box);
$box->print_shape;