boost : : vertices()
In this article, we will see how to access vertices using boost : : vertices().
using namespace std;
using namespace boost;
int main()
{
adjacency_list<> g;
add_vertex(g);
add_vertex(g);
add_vertex(g);
add_vertex(g);
pair<adjacency_list<>::vertex_iterator,adjacency_list<>::vertex_iterator> vs = vertices(g);
copy(vs.first, vs.second,
ostream_iterator<adjacency_list<>::vertex_descriptor>{
cout, "\n"});
}
We've already seen the functions of adjacency_list and add_vertex()in the previous articles.
To get all points from a graph, call
boost::vertices(). This function returns two iterators of type boost::adjacency_list::vertex_iterator, which refer to the beginning and ending points. The iterators are returned in a std::pair. The above code uses the iterators to write all points to standard output. The output of the above example is displayed as follows:
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