Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

libs/graph/example/family-tree-eg.cpp

//=======================================================================
// Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee, 
//
// This file is part of the Boost Graph Library
//
// You should have received a copy of the License Agreement for the
// Boost Graph Library along with the software; see the file LICENSE.
// If not, contact Office of Research, Indiana University,
// Bloomington, IN 47405.
//
// Permission to modify the code and to distribute the code is
// granted, provided the text of this NOTICE is retained, a notice if
// the code was modified is included with the above COPYRIGHT NOTICE
// and with the COPYRIGHT NOTICE in the LICENSE file, and that the
// LICENSE file is distributed with the modified code.
//
// LICENSOR MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED.
// By way of example, but not limitation, Licensor MAKES NO
// REPRESENTATIONS OR WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY
// PARTICULAR PURPOSE OR THAT THE USE OF THE LICENSED SOFTWARE COMPONENTS
// OR DOCUMENTATION WILL NOT INFRINGE ANY PATENTS, COPYRIGHTS, TRADEMARKS
// OR OTHER RIGHTS.
//=======================================================================
#include <boost/config.hpp>
#include <iostream>
#include <vector>
#include <string>
#include <boost/graph/adjacency_list.hpp>
#include <boost/tuple/tuple.hpp>
enum family
{ Jeanie, Debbie, Rick, John, Amanda, Margaret, Benjamin, N };
int
main()
{
  using namespace boost;
  const char *name[] = { "Jeanie", "Debbie", "Rick", "John", "Amanda",
    "Margaret", "Benjamin"
  };

  adjacency_list <> g(N);
  add_edge(Jeanie, Debbie, g);
  add_edge(Jeanie, Rick, g);
  add_edge(Jeanie, John, g);
  add_edge(Debbie, Amanda, g);
  add_edge(Rick, Margaret, g);
  add_edge(John, Benjamin, g);

  graph_traits < adjacency_list <> >::vertex_iterator i, end;
  graph_traits < adjacency_list <> >::adjacency_iterator ai, a_end;
  property_map < adjacency_list <>, vertex_index_t >::type
    index_map = get(vertex_index, g);

  for (tie(i, end) = vertices(g); i != end; ++i) {
    std::cout << name[get(index_map, *i)];
    tie(ai, a_end) = adjacent_vertices(*i, g);
    if (ai == a_end)
      std::cout << " has no children";
    else
      std::cout << " is the parent of ";
    for (; ai != a_end; ++ai) {
      std::cout << name[get(index_map, *ai)];
      if (boost::next(ai) != a_end)
        std::cout << ", ";
    }
    std::cout << std::endl;
  }
  return EXIT_SUCCESS;
}