Code	

my @a=qw(a b d); 
my @b=qw(c c e); 
my $g = Graph->new( undirected => 1 ); 
for (my $r = 0; $r <= 2; $r++) { 
 	$g->add_edge($a[$r], $b[$r]); 
 } 
 
my @subgraphs = $g->connected_components; 
my $V = $g->vertices; 
print "\n$V\n"; 
print "----connected components------------"; 
use YAML; print Dump \@subgraphs;