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79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
//=======================================================================
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// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
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// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
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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, University of Notre Dame, Notre
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// Dame, IN 46556.
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//
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// Permission to modify the code and to distribute modified code is
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// granted, provided the text of this NOTICE is retained, a notice that
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// the code was modified is included with the above COPYRIGHT NOTICE and
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// with the COPYRIGHT NOTICE in the LICENSE file, and that the LICENSE
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// 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 <boost/config.hpp>
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#include <vector>
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#include <iostream>
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#include <iterator>
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#include <boost/graph/adjacency_list.hpp>
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#include <boost/graph/kruskal_min_spanning_tree.hpp>
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/*
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Sample output:
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Print the edge in MST:
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0 <--> 2 with weight of 1
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3 <--> 4 with weight of 1
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4 <--> 0 with weight of 1
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1 <--> 3 with weight of 1
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*/
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int main(int , char* [])
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{
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using namespace boost;
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using namespace std;
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typedef adjacency_list< vecS, vecS, undirectedS,
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no_property, property<edge_weight_t,int> > Graph;
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typedef Graph::edge_descriptor Edge;
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typedef Graph::vertex_descriptor Vertex;
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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(1,3), E(1,4), E(2,1), E(2,3), E(3,4), E(4,0),E(4,1)};
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int weights[] = { 1, 1, 2, 7, 3, 1, 1, 1};
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Graph G(num_nodes, edges, edges + sizeof(edges)/sizeof(E), weights);
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property_map<Graph, edge_weight_t>::type weight = get(edge_weight, G);
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typedef std::vector<Edge> container;
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std::vector<Edge> spanning_tree_edges;
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spanning_tree_edges.reserve(num_vertices(G));
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kruskal_minimum_spanning_tree(G, std::back_inserter(spanning_tree_edges));
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cout << "Print the edge in MST:" << endl;
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for (std::vector<Edge>::iterator ei = spanning_tree_edges.begin();
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ei != spanning_tree_edges.end(); ++ei) {
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cout << source(*ei, G) << " <--> "
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<< target(*ei, G)
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<< " with weight of " << weight[*ei]
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<< endl;
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}
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return 0;
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}
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