update source to Ceph Pacific 16.2.2

[ceph.git] / ceph / src / boost / libs / graph / example / strong-components.cpp

//=======================================================================
// Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee,
//
// 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/config.hpp>
#include <vector>
#include <iostream>
#include <boost/graph/strong_components.hpp>
#include <boost/graph/adjacency_list.hpp>

int main()
{
    using namespace boost;
    typedef adjacency_list< vecS, vecS, directedS > Graph;
    const int N = 6;
    Graph G(N);
    add_edge(0, 1, G);
    add_edge(1, 1, G);
    add_edge(1, 3, G);
    add_edge(1, 4, G);
    add_edge(3, 4, G);
    add_edge(3, 0, G);
    add_edge(4, 3, G);
    add_edge(5, 2, G);

    std::vector< int > c(N);
    int num = strong_components(
        G, make_iterator_property_map(c.begin(), get(vertex_index, G), c[0]));

    std::cout << "Total number of components: " << num << std::endl;
    std::vector< int >::iterator i;
    for (i = c.begin(); i != c.end(); ++i)
        std::cout << "Vertex " << i - c.begin() << " is in component " << *i
                  << std::endl;
    return EXIT_SUCCESS;
}