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3rdparty/boost_1_81_0/libs/graph/example/transpose-example.cpp 1.67 KB
977ed18d   Hu Chunming   提交三方库
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  //=======================================================================
  // 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 <iostream>
  #include <boost/graph/transpose_graph.hpp>
  #include <boost/graph/adjacency_list.hpp>
  #include <boost/graph/graph_utility.hpp>
  
  int main()
  {
      using namespace boost;
      typedef adjacency_list< vecS, vecS, bidirectionalS,
          property< vertex_name_t, char > >
          graph_t;
  
      enum
      {
          a,
          b,
          c,
          d,
          e,
          f,
          g,
          N
      };
      graph_t G(N);
      property_map< graph_t, vertex_name_t >::type name_map = get(vertex_name, G);
      char name = 'a';
      graph_traits< graph_t >::vertex_iterator v, v_end;
      for (boost::tie(v, v_end) = vertices(G); v != v_end; ++v, ++name)
          name_map[*v] = name;
  
      typedef std::pair< int, int > E;
      E edge_array[] = { E(a, c), E(a, d), E(b, a), E(b, d), E(c, f), E(d, c),
          E(d, e), E(d, f), E(e, b), E(e, g), E(f, e), E(f, g) };
      for (int i = 0; i < 12; ++i)
          add_edge(edge_array[i].first, edge_array[i].second, G);
  
      print_graph(G, name_map);
      std::cout << std::endl;
  
      graph_t G_T;
      transpose_graph(G, G_T);
  
      print_graph(G_T, name_map);
  
      graph_traits< graph_t >::edge_iterator ei, ei_end;
      for (boost::tie(ei, ei_end) = edges(G); ei != ei_end; ++ei)
          assert(edge(target(*ei, G), source(*ei, G), G_T).second == true);
      return 0;
  }