1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
//=======================================================================
// 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/adjacency_list.hpp>
#include <boost/graph/prim_minimum_spanning_tree.hpp>
int main()
{
using namespace boost;
typedef adjacency_list< vecS, vecS, undirectedS,
property< vertex_distance_t, int >, property< edge_weight_t, int > >
Graph;
typedef std::pair< int, int > E;
const int num_nodes = 5;
E edges[]
= { E(0, 2), E(1, 3), E(1, 4), E(2, 1), E(2, 3), E(3, 4), E(4, 0) };
int weights[] = { 1, 1, 2, 7, 3, 1, 1 };
#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
Graph g(num_nodes);
property_map< Graph, edge_weight_t >::type weightmap = get(edge_weight, g);
for (std::size_t j = 0; j < sizeof(edges) / sizeof(E); ++j)
{
graph_traits< Graph >::edge_descriptor e;
bool inserted;
boost::tie(e, inserted) = add_edge(edges[j].first, edges[j].second, g);
weightmap[e] = weights[j];
}
#else
Graph g(edges, edges + sizeof(edges) / sizeof(E), weights, num_nodes);
#endif
std::vector< graph_traits< Graph >::vertex_descriptor > p(num_vertices(g));
#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
property_map< Graph, vertex_distance_t >::type distance
= get(vertex_distance, g);
property_map< Graph, vertex_index_t >::type indexmap = get(vertex_index, g);
prim_minimum_spanning_tree(g, *vertices(g).first, &p[0], distance,
weightmap, indexmap, default_dijkstra_visitor());
#else
prim_minimum_spanning_tree(g, &p[0]);
#endif
for (std::size_t i = 0; i != p.size(); ++i)
if (p[i] != i)
std::cout << "parent[" << i << "] = " << p[i] << std::endl;
else
std::cout << "parent[" << i << "] = no parent" << std::endl;
return EXIT_SUCCESS;
}
|
