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//=======================================================================
// 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 <string>
#include <boost/tuple/tuple.hpp>
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/visitors.hpp>
#include <boost/graph/breadth_first_search.hpp>
#include <map>
#include <boost/graph/adj_list_serialize.hpp>
#include <boost/archive/text_iarchive.hpp>
struct vertex_properties {
std::string name;
template<class Archive>
void serialize(Archive & ar, const unsigned int version) {
ar & name;
}
};
struct edge_properties {
std::string name;
template<class Archive>
void serialize(Archive & ar, const unsigned int version) {
ar & name;
}
};
using namespace boost;
typedef adjacency_list<vecS, vecS, undirectedS,
vertex_properties, edge_properties> Graph;
typedef graph_traits<Graph>::vertex_descriptor Vertex;
typedef graph_traits<Graph>::edge_descriptor Edge;
class bacon_number_recorder : public default_bfs_visitor
{
public:
bacon_number_recorder(int* dist) : d(dist) { }
void tree_edge(Edge e, const Graph& g) const {
Vertex u = source(e, g), v = target(e, g);
d[v] = d[u] + 1;
}
private:
int* d;
};
int main()
{
std::ifstream ifs("./kevin-bacon2.dat");
if (!ifs) {
std::cerr << "No ./kevin-bacon2.dat file" << std::endl;
return EXIT_FAILURE;
}
archive::text_iarchive ia(ifs);
Graph g;
ia >> g;
std::vector<int> bacon_number(num_vertices(g));
// Get the vertex for Kevin Bacon
Vertex src;
graph_traits<Graph>::vertex_iterator i, end;
for (tie(i, end) = vertices(g); i != end; ++i)
if (g[*i].name == "Kevin Bacon")
src = *i;
// Set Kevin's number to zero
bacon_number[src] = 0;
// Perform a breadth first search to compute everyone' Bacon number.
breadth_first_search(g, src,
visitor(bacon_number_recorder(&bacon_number[0])));
for (tie(i, end) = vertices(g); i != end; ++i)
std::cout << g[*i].name << " has a Bacon number of "
<< bacon_number[*i] << std::endl;
return 0;
}
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