Bonjour

Dear 

I want to check whether there is a directed path between two given nodes (A and C) using Boost graph. I also want to access intermediate edges to examine PDAG properties. 
I test 
void transitive_closure(const Graph& g, GraphTC& tc) method. But i want to check between two given nodes.

Now i want to ask you

                        G_to_TC_VertexMap g_to_tc_map, VertexIndexMap index_map)
In the above method, how i can declare 

G_to_TC_VertexMap g_to_tc_map, VertexIndexMap index_map?
http://www.boost.org/doc/libs/1_39_0/libs/graph/doc/transitive_closure.html

I will be thankful to you

Best Regards

Amanullah YASIN
Master2 (ECD)
Ecole Polytechnique
Université de Nantes, France.
Mob#  06 47 62 89 96
Fix #   02 72 00 26 45
amanyasin@gmail.com