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Diffstat (limited to 'src/boost/libs/graph/example/prim-telephone.cpp')
-rw-r--r-- | src/boost/libs/graph/example/prim-telephone.cpp | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/boost/libs/graph/example/prim-telephone.cpp b/src/boost/libs/graph/example/prim-telephone.cpp new file mode 100644 index 000000000..1f256db06 --- /dev/null +++ b/src/boost/libs/graph/example/prim-telephone.cpp @@ -0,0 +1,72 @@ +//======================================================================= +// 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 <vector> +#include <boost/lexical_cast.hpp> +#include <boost/graph/graphviz.hpp> +#include <boost/graph/prim_minimum_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); + } + + typedef graph_traits< Graph >::vertex_descriptor Vertex; + std::vector< Vertex > parent(num_vertices(g)); + property_map< Graph, edge_weight_t >::type weight = get(edge_weight, g); +#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 + property_map< Graph, vertex_index_t >::type indexmap = get(vertex_index, g); + std::vector< std::size_t > distance(num_vertices(g)); + prim_minimum_spanning_tree(g, *vertices(g).first, &parent[0], &distance[0], + weight, indexmap, default_dijkstra_visitor()); +#else + prim_minimum_spanning_tree(g, &parent[0]); +#endif + + int total_weight = 0; + for (int v = 0; v < num_vertices(g); ++v) + if (parent[v] != v) + total_weight += get(weight, edge(parent[v], v, g).first); + std::cout << "total weight: " << total_weight << std::endl; + + for (int u = 0; u < num_vertices(g); ++u) + if (parent[u] != u) + edge_attr_map[edge(parent[u], u, g_dot).first]["color"] = "black"; + std::ofstream out("figs/telephone-mst-prim.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"; + write_graphviz(out, g_dot); + + return EXIT_SUCCESS; +} |