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//=======================================================================
// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
//
// 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 <algorithm>
#include <boost/graph/adjacency_list.hpp>
using namespace std;
using namespace boost;
/*
Vertex Basics
This example demonstrates the GGCL Vertex interface.
Sample output:
vertices(g) = 0 1 2 3 4
vertex id: 0
out-edges: (0,1) (0,2) (0,3) (0,4)
in-edges: (2,0) (3,0) (4,0)
adjacent vertices: 1 2 3 4
vertex id: 1
out-edges:
in-edges: (0,1) (3,1) (4,1)
adjacent vertices:
vertex id: 2
out-edges: (2,0) (2,4)
in-edges: (0,2)
adjacent vertices: 0 4
vertex id: 3
out-edges: (3,0) (3,1) (3,4)
in-edges: (0,3)
adjacent vertices: 0 1 4
vertex id: 4
out-edges: (4,0) (4,1)
in-edges: (0,4) (2,4) (3,4)
adjacent vertices: 0 1
*/
/* some helper functors for output */
template <class Graph>
struct print_edge {
print_edge(Graph& g) : G(g) { }
typedef typename boost::graph_traits<Graph>::edge_descriptor Edge;
typedef typename boost::graph_traits<Graph>::vertex_descriptor Vertex;
void operator()(Edge e) const
{
typename boost::property_map<Graph, vertex_index_t>::type
id = get(vertex_index, G);
Vertex src = source(e, G);
Vertex targ = target(e, G);
cout << "(" << id[src] << "," << id[targ] << ") ";
}
Graph& G;
};
template <class Graph>
struct print_index {
print_index(Graph& g) : G(g){ }
typedef typename boost::graph_traits<Graph>::vertex_descriptor Vertex;
void operator()(Vertex c) const
{
typename boost::property_map<Graph,vertex_index_t>::type
id = get(vertex_index, G);
cout << id[c] << " ";
}
Graph& G;
};
template <class Graph>
struct exercise_vertex {
typedef typename boost::graph_traits<Graph>::vertex_descriptor Vertex;
exercise_vertex(Graph& _g) : g(_g) { }
void operator()(Vertex v) const
{
typename boost::property_map<Graph, vertex_index_t>::type
id = get(vertex_index, g);
cout << "vertex id: " << id[v] << endl;
cout << "out-edges: ";
for_each(out_edges(v, g).first, out_edges(v,g).second,
print_edge<Graph>(g));
cout << endl;
cout << "in-edges: ";
for_each(in_edges(v, g).first, in_edges(v,g).second,
print_edge<Graph>(g));
cout << endl;
cout << "adjacent vertices: ";
for_each(adjacent_vertices(v,g).first,
adjacent_vertices(v,g).second, print_index<Graph>(g));
cout << endl << endl;
}
Graph& g;
};
int
main()
{
typedef adjacency_list<vecS,vecS,bidirectionalS> MyGraphType;
typedef pair<int,int> Pair;
Pair edge_array[11] = { Pair(0,1), Pair(0,2), Pair(0,3), Pair(0,4),
Pair(2,0), Pair(3,0), Pair(2,4), Pair(3,1),
Pair(3,4), Pair(4,0), Pair(4,1) };
/* Construct a graph using the edge_array*/
MyGraphType g(5);
for (int i=0; i<11; ++i)
add_edge(edge_array[i].first, edge_array[i].second, g);
boost::property_map<MyGraphType, vertex_index_t>::type
id = get(vertex_index, g);
cout << "vertices(g) = ";
boost::graph_traits<MyGraphType>::vertex_iterator vi;
for (vi = vertices(g).first; vi != vertices(g).second; ++vi)
std::cout << id[*vi] << " ";
std::cout << std::endl;
/* Use the STL for_each algorithm to "exercise" all
of the vertices in the graph */
for_each(vertices(g).first, vertices(g).second,
exercise_vertex<MyGraphType>(g));
return 0;
}
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