| // (C) Copyright Andrew Sutton 2007 |
| // |
| // Use, modification and distribution are subject to the |
| // Boost Software License, Version 1.0 (See accompanying file |
| // LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) |
| |
| |
| //[degree_centrality_example |
| #include <iostream> |
| #include <iomanip> |
| |
| #include <boost/graph/undirected_graph.hpp> |
| #include <boost/graph/exterior_property.hpp> |
| #include <boost/graph/degree_centrality.hpp> |
| |
| #include "helper.hpp" |
| |
| using namespace std; |
| using namespace boost; |
| |
| // The Actor type stores the name of each vertex in the graph. |
| struct Actor |
| { |
| string name; |
| }; |
| |
| // Declare the graph type and its vertex and edge types. |
| typedef undirected_graph<Actor> Graph; |
| typedef graph_traits<Graph>::vertex_descriptor Vertex; |
| typedef graph_traits<Graph>::edge_descriptor Edge; |
| |
| // The name map provides an abstract accessor for the names of |
| // each vertex. This is used during graph creation. |
| typedef property_map<Graph, string Actor::*>::type NameMap; |
| |
| // Declare a container type for degree centralities and its |
| // corresponding property map. |
| typedef exterior_vertex_property<Graph, unsigned> CentralityProperty; |
| typedef CentralityProperty::container_type CentralityContainer; |
| typedef CentralityProperty::map_type CentralityMap; |
| |
| int |
| main(int argc, char *argv[]) |
| { |
| // Create the graph and a property map that provides access |
| // to the actor names. |
| Graph g; |
| NameMap nm(get(&Actor::name, g)); |
| |
| // Read the graph from standard input. |
| read_graph(g, nm, cin); |
| |
| // Compute the degree centrality for graph. |
| CentralityContainer cents(num_vertices(g)); |
| CentralityMap cm(cents, g); |
| all_degree_centralities(g, cm); |
| |
| // Print the degree centrality of each vertex. |
| graph_traits<Graph>::vertex_iterator i, end; |
| for(tie(i, end) = vertices(g); i != end; ++i) { |
| cout << setiosflags(ios::left) << setw(12) |
| << g[*i].name << cm[*i] << endl; |
| } |
| |
| return 0; |
| } |
| //] |