89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
//=======================================================================
|
|
// 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;
|
|
|
|
|
|
/*
|
|
Edge Basics
|
|
|
|
This example demonstrates the GGCL Edge interface
|
|
|
|
There is not much to the Edge interface. Basically just two
|
|
functions to access the source and target vertex:
|
|
|
|
source(e)
|
|
target(e)
|
|
|
|
and one associated type for the vertex type:
|
|
|
|
edge_traits<Edge>::vertex_type
|
|
|
|
Sample output:
|
|
|
|
(0,1) (0,2) (0,3) (0,4) (2,0) (2,4) (3,0) (3,1)
|
|
|
|
*/
|
|
|
|
|
|
|
|
template <class Graph>
|
|
struct exercise_edge {
|
|
exercise_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
|
|
{
|
|
//begin
|
|
// Get the associated vertex type out of the edge using the
|
|
// edge_traits class
|
|
// Use the source() and target() functions to access the vertices
|
|
// that belong to Edge e
|
|
Vertex src = source(e, G);
|
|
Vertex targ = target(e, G);
|
|
|
|
// print out the vertex id's just because
|
|
cout << "(" << src << "," << targ << ") ";
|
|
//end
|
|
}
|
|
|
|
Graph& G;
|
|
};
|
|
|
|
|
|
int
|
|
main()
|
|
{
|
|
typedef adjacency_list<> MyGraph;
|
|
|
|
typedef pair<int,int> Pair;
|
|
Pair edge_array[8] = { Pair(0,1), Pair(0,2), Pair(0,3), Pair(0,4),
|
|
Pair(2,0), Pair(3,0), Pair(2,4), Pair(3,1) };
|
|
|
|
// Construct a graph using the edge_array (passing in pointers
|
|
// (iterators) to the beginning and end of the array), and
|
|
// specifying the number of vertices as 5
|
|
MyGraph G(5);
|
|
for (int i=0; i<8; ++i)
|
|
add_edge(edge_array[i].first, edge_array[i].second, G);
|
|
|
|
// Use the STL for_each algorithm to "exercise" all of the edges in
|
|
// the graph
|
|
for_each(edges(G).first, edges(G).second, exercise_edge<MyGraph>(G));
|
|
cout << endl;
|
|
return 0;
|
|
}
|