977ed18d
 Hu Chunming
提交三方库
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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)
//=======================================================================
/*
IMPORTANT:
~~~~~~~~~~
This example appears to be broken and crashes at runtime, see
https://github.com/boostorg/graph/issues/148
*/
#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>
#include <boost/serialization/string.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(int argc, const char** argv)
{
std::ifstream ifs(argc >= 2 ? argv[1] : "./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 (boost::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 (boost::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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