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54 lines
2.1 KiB
C++
54 lines
2.1 KiB
C++
//=======================================================================
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// Copyright 2001 Jeremy G. Siek, Andrew Lumsdaine, Lie-Quan Lee,
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//
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// This file is part of the Boost Graph Library
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//
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// You should have received a copy of the License Agreement for the
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// Boost Graph Library along with the software; see the file LICENSE.
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// If not, contact Office of Research, Indiana University,
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// Bloomington, IN 47405.
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//
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// Permission to modify the code and to distribute the code is
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// granted, provided the text of this NOTICE is retained, a notice if
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// the code was modified is included with the above COPYRIGHT NOTICE
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// and with the COPYRIGHT NOTICE in the LICENSE file, and that the
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// LICENSE file is distributed with the modified code.
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//
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// LICENSOR MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED.
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// By way of example, but not limitation, Licensor MAKES NO
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// REPRESENTATIONS OR WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY
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// PARTICULAR PURPOSE OR THAT THE USE OF THE LICENSED SOFTWARE COMPONENTS
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// OR DOCUMENTATION WILL NOT INFRINGE ANY PATENTS, COPYRIGHTS, TRADEMARKS
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// OR OTHER RIGHTS.
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//=======================================================================
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#include <iostream>
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#include <boost/graph/adjacency_list.hpp>
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#include <boost/graph/prim_minimum_spanning_tree.hpp>
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int
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main()
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{
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using namespace boost;
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typedef adjacency_list < vecS, vecS, undirectedS,
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property<vertex_distance_t, int>, property < edge_weight_t, int > > Graph;
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typedef std::pair < int, int >E;
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const int num_nodes = 5;
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E edges[] = { E(0, 2), E(1, 1), E(1, 3), E(1, 4), E(2, 1), E(2, 3),
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E(3, 4), E(4, 0)
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};
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int weights[] = { 1, 2, 1, 2, 7, 3, 1, 1 };
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Graph g(num_nodes, edges, edges + sizeof(edges) / sizeof(E), weights);
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std::vector < graph_traits < Graph >::vertex_descriptor >
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p(num_vertices(g));
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prim_minimum_spanning_tree(g, &p[0]);
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for (std::size_t i = 0; i != p.size(); ++i)
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if (p[i] != i)
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std::cout << "parent[" << i << "] = " << p[i] << std::endl;
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else
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std::cout << "parent[" << i << "] = no parent" << std::endl;
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return EXIT_SUCCESS;
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}
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