我有一个有向图(通过 boost::graph 库中的 adjacency_graph 实现),我试图找到某个顶点的父顶点。
过去(通过 pygraph)我只是简单地反转了有向图,然后进行了邻居搜索,但似乎使用 boost::reverse_graph 反转图会将我的有向图变成双向图,因此我不能使用相邻顶点方法了。
有没有更好的方法来获取父顶点?
谢谢。
这是我当前的示例代码:
#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/reverse_graph.hpp>
#include <iostream>
typedef boost::adjacency_list< boost::setS, boost::vecS, boost::directedS > Graph;
typedef boost::reverse_graph<Graph> Rgraph;
typedef Graph::vertex_descriptor Vertex;
int main()
{
Graph graph;
Vertex v0 = boost::add_vertex(graph);
Vertex v1 = boost::add_vertex(graph);
Vertex v2 = boost::add_vertex(graph);
Vertex v3 = boost::add_vertex(graph);
Vertex v4 = boost::add_vertex(graph);
Vertex v5 = boost::add_vertex(graph);
Vertex v6 = boost::add_vertex(graph);
boost::add_edge(v0,v1,graph);
boost::add_edge(v1,v2,graph);
boost::add_edge(v2,v3,graph);
boost::add_edge(v2,v4,graph);
boost::add_edge(v3,v5,graph);
boost::add_edge(v4,v5,graph);
boost::add_edge(v5,v6,graph);
Graph::adjacency_iterator ibegin, iend;
for (boost::tie(ibegin, iend) = boost::adjacent_vertices(v2, graph); ibegin != iend; ++ibegin)
{
std::cout << *ibegin << std::endl;
}
std::cout << std::endl << "############# RGRAPH #############" << std::endl << std::endl;
Rgraph rgraph(graph);
Rgraph::adjacency_iterator rbegin, rend;
for (boost::tie(rbegin, rend) = boost::adjacent_vertices(v2, rgraph); rbegin != rend; ++rbegin)
{
std::cout << *rbegin << std::endl;
}
std::cout << std::endl;
return 0;
}