// Copyright (C) 2004 Jeremy Siek <jsiek@cs.indiana.edu>
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/depth_first_search.hpp>
#include <boost/graph/transitive_closure.hpp>
#include <iostream>
using namespace std;

using namespace boost;
typedef adjacency_list<> graph_t;

int main(int argc, char* argv[])
{
    graph_t g(5), g_TC;

    add_edge(0, 2, g);
    add_edge(1, 0, g);
    add_edge(1, 2, g);
    add_edge(1, 4, g);
    add_edge(3, 0, g);
    add_edge(3, 2, g);
    add_edge(4, 2, g);
    add_edge(4, 3, g);

    transitive_closure(g, g_TC);

    cout << "original graph: 0->2, 1->0, 1->2, 1->4, 3->0, 3->2, 4->2, 4->3"
         << endl;
    cout << "transitive closure: ";
    graph_t::edge_iterator i, iend;
    for (boost::tie(i, iend) = edges(g_TC); i != iend; ++i)
    {
        cout << source(*i, g_TC) << "->" << target(*i, g_TC) << " ";
    }
    cout << endl;
}