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296884f7d9
renamed dynamic components to incremental components added regression.cfg file to test/ [SVN r9337]
126 lines
3.7 KiB
C++
126 lines
3.7 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 <iostream>
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#include <vector>
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#include <algorithm>
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#include <utility>
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#include <boost/graph/adjacency_list.hpp>
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#include <boost/pending/disjoint_sets.hpp>
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#include <boost/graph/incremental_components.hpp>
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/*
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This example shows how to use the disjoint set data structure
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to compute the connected components of an undirected, changing
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graph.
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Sample output:
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An undirected graph:
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0 <--> 1 4
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1 <--> 0 4
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2 <--> 5
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3 <-->
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4 <--> 1 0
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5 <--> 2
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representative[0] = 1
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representative[1] = 1
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representative[2] = 5
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representative[3] = 3
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representative[4] = 1
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representative[5] = 5
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component 0 contains: 4 1 0
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component 1 contains: 3
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component 2 contains: 5 2
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*/
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using namespace std;
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int main(int , char* [])
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{
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using namespace boost;
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typedef adjacency_list <vecS, vecS, undirectedS> Graph;
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typedef graph_traits<Graph>::vertex_descriptor Vertex;
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typedef graph_traits<Graph>::vertices_size_type size_type;
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const int N = 6;
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Graph G(N);
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std::vector<Vertex> rank(num_vertices(G));
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std::vector<Vertex> parent(num_vertices(G));
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// VC++ version of std::vector has no ::pointer, so
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// I use ::value_type* instead.
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typedef std::vector<size_type>::value_type* Rank;
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typedef std::vector<Vertex>::value_type* Parent;
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disjoint_sets<Rank, Parent> ds(&rank[0], &parent[0]);
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initialize_incremental_components(G, ds);
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incremental_components(G, ds);
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graph_traits<Graph>::edge_descriptor e;
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bool flag;
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boost::tie(e,flag) = add_edge(0, 1, G);
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ds.union_set(0,1);
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boost::tie(e,flag) = add_edge(1, 4, G);
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ds.union_set(1,4);
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boost::tie(e,flag) = add_edge(4, 0, G);
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ds.union_set(4,0);
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boost::tie(e,flag) = add_edge(2, 5, G);
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ds.union_set(2,5);
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cout << "An undirected graph:" << endl;
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print_graph(G, get(vertex_index, G));
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cout << endl;
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graph_traits<Graph>::vertex_iterator i,end;
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for (boost::tie(i, end) = vertices(G); i != end; ++i)
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cout << "representative[" << *i << "] = " <<
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ds.find_set(*i) << endl;;
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cout << endl;
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typedef component_index<int> Components;
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Components components(&parent[0], &parent[0] + parent.size());
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for (Components::size_type c = 0; c < components.size(); ++c) {
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cout << "component " << c << " contains: ";
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Components::value_type::iterator
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j = components[c].begin(),
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jend = components[c].end();
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for ( ; j != jend; ++j)
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cout << *j << " ";
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cout << endl;
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}
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return 0;
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}
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