kruskal-telephone.cpp
2.51 KB
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
57
58
59
60
61
62
63
64
65
66
67
68
69
//=======================================================================
// 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)
//=======================================================================
/*
IMPORTANT!!!
~~~~~~~~~~~~
This example uses interfaces that have been deprecated and removed from
Boost.Grpah. Someone needs to update it, as it does NOT compile.
*/
#include <boost/config.hpp>
#include <iostream>
#include <fstream>
#include <boost/lexical_cast.hpp>
#include <boost/graph/graphviz.hpp>
#include <boost/graph/kruskal_min_spanning_tree.hpp>
int main()
{
using namespace boost;
GraphvizGraph g_dot;
read_graphviz("figs/telephone-network.dot", g_dot);
typedef adjacency_list< vecS, vecS, undirectedS, no_property,
property< edge_weight_t, int > >
Graph;
Graph g(num_vertices(g_dot));
property_map< GraphvizGraph, edge_attribute_t >::type edge_attr_map
= get(edge_attribute, g_dot);
graph_traits< GraphvizGraph >::edge_iterator ei, ei_end;
for (boost::tie(ei, ei_end) = edges(g_dot); ei != ei_end; ++ei)
{
int weight = lexical_cast< int >(edge_attr_map[*ei]["label"]);
property< edge_weight_t, int > edge_property(weight);
add_edge(source(*ei, g_dot), target(*ei, g_dot), edge_property, g);
}
std::vector< graph_traits< Graph >::edge_descriptor > mst;
typedef std::vector< graph_traits< Graph >::edge_descriptor >::size_type
size_type;
kruskal_minimum_spanning_tree(g, std::back_inserter(mst));
property_map< Graph, edge_weight_t >::type weight = get(edge_weight, g);
int total_weight = 0;
for (size_type e = 0; e < mst.size(); ++e)
total_weight += get(weight, mst[e]);
std::cout << "total weight: " << total_weight << std::endl;
typedef graph_traits< Graph >::vertex_descriptor Vertex;
for (size_type i = 0; i < mst.size(); ++i)
{
Vertex u = source(mst[i], g), v = target(mst[i], g);
edge_attr_map[edge(u, v, g_dot).first]["color"] = "black";
}
std::ofstream out("figs/telephone-mst-kruskal.dot");
graph_property< GraphvizGraph, graph_edge_attribute_t >::type&
graph_edge_attr_map
= get_property(g_dot, graph_edge_attribute);
graph_edge_attr_map["color"] = "gray";
graph_edge_attr_map["style"] = "bold";
write_graphviz(out, g_dot);
return EXIT_SUCCESS;
}