Finding connected components in a graph.

[zing]

I have two arrays having the connection information "from -->to" {@a=(a,b,d) , @b=(c,c,e)} The following code finds the connected components based on the content of these two arrays.

    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;

------------OUTPUT----------------------

    
5
----connected components--------------- 
- 
  - c 
  - a 
  - b 
- 
  - e 
  - d

My question is how do I access only one of the connected components? I.e. either C-A-B or D-E . Also how do I find the total number of connected components.