我试图使用Boost制作图形挖掘程序,所以我从图形结构开始,这是我做的代码:
#include <iostream>
#include <boost/graph/adjacency_list.hpp>
using namespace std;
using namespace boost;
//vertex
struct VertexProperties
{
int id;
int label;
VertexProperties()= default;
VertexProperties(unsigned i, unsigned l) : id(i), label(l) {}
};
//edge
struct EdgeProperties
{
unsigned id;
unsigned label;
EdgeProperties()= default;
EdgeProperties(unsigned i, unsigned l) : id(i), label(l) {}
};
//Graph
struct GraphProperties
{
unsigned id;
unsigned label;
GraphProperties()= default;
GraphProperties(unsigned i, unsigned l) : id(i), label(l) {}
};
//adjency list
typedef boost::adjacency_list<
boost::vecS, boost::vecS, boost::directedS,
VertexProperties,
EdgeProperties,
GraphProperties
> Graph;
//iterators
typedef boost::graph_traits<Graph>::vertex_descriptor vertex_t;
typedef boost::graph_traits<Graph>::edge_descriptor edge_t;
/***********************************************/
int main()
{
Graph g;
vertex_t v1 = boost::add_vertex(VertexProperties(1,10),g);
vertex_t v2 = boost::add_vertex(VertexProperties(2,20),g);
//edge_t e1= boost::add_edge(EdgeProperties(3,55),g);
std::cout << "Vertice: " <<num_vertices(g) << std::endl;
std::cout << "edges: " <<num_edges(g) << std::endl;
return 0;
}
这一行存在问题:
edge_t e1= boost::add_edge(EdgeProperties(3,55),g);
如何创建此边缘? PS:请告诉代码是否正确(我的意思是vue的概念)
答案 0 :(得分:1)
注意:我正在使用GCC 4.8(带-std = c ++ 11标志)和Boost 1.48。
我在您的代码中看到了两个问题。首先,传递给boost :: add_edge(...)的前两个参数应该是与边相关联的顶点。所以在你的情况下,呼叫将是
edge_t e1= boost::add_edge(v1, v2, EdgeProperties(3,55),g);
其次,e1的类型据我所知应该是
std::pair<edge_descriptor, bool>
所以你的第二个typedef将是
typedef std::pair<boost::graph_traits<Graph>::edge_descriptor, bool> edge_t;
或者,您可以使用auto关键字来描述e1的类型。例如,
auto e1= boost::add_edge(v1, v2, EdgeProperties(3,55),g);