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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/graph/example/kruskal-telephone.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/boost/libs/graph/example/kruskal-telephone.cpp b/src/boost/libs/graph/example/kruskal-telephone.cpp new file mode 100644 index 00000000..614775b6 --- /dev/null +++ b/src/boost/libs/graph/example/kruskal-telephone.cpp @@ -0,0 +1,66 @@ +//======================================================================= +// 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; +} |