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-rw-r--r--src/boost/libs/graph/example/dijkstra-example-listS.cpp91
1 files changed, 91 insertions, 0 deletions
diff --git a/src/boost/libs/graph/example/dijkstra-example-listS.cpp b/src/boost/libs/graph/example/dijkstra-example-listS.cpp
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+++ b/src/boost/libs/graph/example/dijkstra-example-listS.cpp
@@ -0,0 +1,91 @@
+//=======================================================================
+// 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 <fstream>
+
+#include <boost/graph/graph_traits.hpp>
+#include <boost/graph/adjacency_list.hpp>
+#include <boost/graph/dijkstra_shortest_paths.hpp>
+
+using namespace boost;
+
+int
+main(int, char *[])
+{
+ typedef adjacency_list_traits<listS, listS,
+ directedS>::vertex_descriptor vertex_descriptor;
+ typedef adjacency_list < listS, listS, directedS,
+ property<vertex_index_t, int,
+ property<vertex_name_t, char,
+ property<vertex_distance_t, int,
+ property<vertex_predecessor_t, vertex_descriptor> > > >,
+ property<edge_weight_t, int> > graph_t;
+ typedef std::pair<int, int> Edge;
+
+ const int num_nodes = 5;
+ enum nodes { A, B, C, D, E };
+ Edge edge_array[] = { Edge(A, C), Edge(B, B), Edge(B, D), Edge(B, E),
+ Edge(C, B), Edge(C, D), Edge(D, E), Edge(E, A), Edge(E, B)
+ };
+ int weights[] = { 1, 2, 1, 2, 7, 3, 1, 1, 1 };
+ int num_arcs = sizeof(edge_array) / sizeof(Edge);
+ graph_traits<graph_t>::vertex_iterator i, iend;
+
+ graph_t g(edge_array, edge_array + num_arcs, weights, num_nodes);
+ property_map<graph_t, edge_weight_t>::type weightmap = get(edge_weight, g);
+
+ // Manually intialize the vertex index and name maps
+ property_map<graph_t, vertex_index_t>::type indexmap = get(vertex_index, g);
+ property_map<graph_t, vertex_name_t>::type name = get(vertex_name, g);
+ int c = 0;
+ for (boost::tie(i, iend) = vertices(g); i != iend; ++i, ++c) {
+ indexmap[*i] = c;
+ name[*i] = 'A' + c;
+ }
+
+ vertex_descriptor s = vertex(A, g);
+
+ property_map<graph_t, vertex_distance_t>::type
+ d = get(vertex_distance, g);
+ property_map<graph_t, vertex_predecessor_t>::type
+ p = get(vertex_predecessor, g);
+ dijkstra_shortest_paths(g, s, predecessor_map(p).distance_map(d));
+
+ std::cout << "distances and parents:" << std::endl;
+ graph_traits < graph_t >::vertex_iterator vi, vend;
+ for (boost::tie(vi, vend) = vertices(g); vi != vend; ++vi) {
+ std::cout << "distance(" << name[*vi] << ") = " << d[*vi] << ", ";
+ std::cout << "parent(" << name[*vi] << ") = " << name[p[*vi]] << std::
+ endl;
+ }
+ std::cout << std::endl;
+
+ std::ofstream dot_file("figs/dijkstra-eg.dot");
+ dot_file << "digraph D {\n"
+ << " rankdir=LR\n"
+ << " size=\"4,3\"\n"
+ << " ratio=\"fill\"\n"
+ << " edge[style=\"bold\"]\n" << " node[shape=\"circle\"]\n";
+
+ graph_traits < graph_t >::edge_iterator ei, ei_end;
+ for (boost::tie(ei, ei_end) = edges(g); ei != ei_end; ++ei) {
+ graph_traits < graph_t >::edge_descriptor e = *ei;
+ graph_traits < graph_t >::vertex_descriptor
+ u = source(e, g), v = target(e, g);
+ dot_file << name[u] << " -> " << name[v]
+ << "[label=\"" << get(weightmap, e) << "\"";
+ if (p[v] == u)
+ dot_file << ", color=\"black\"";
+ else
+ dot_file << ", color=\"grey\"";
+ dot_file << "]";
+ }
+ dot_file << "}";
+ return EXIT_SUCCESS;
+}