C++ Boost Graph Library:输出自定义顶点属性

#include <boost/graph/custom_attribute.hpp>

class CustomAttribute {
public:
    std::string label;
    int value;
};

class CustomVertex {
public:
    int id;
    CustomAttribute attribute;
};

// 创建自定义顶点
CustomVertex vertex1{1, {"Label 1"}};
CustomVertex vertex2{2, {"Label 2"}};
CustomVertex vertex3{3, {"Label 3"}};

// 创建图
std::vector<std::pair<int, CustomVertex>> graph{
    {1, vertex1},
    {2, vertex2},
    {3, vertex3},
};

// 分配自定义属性
boost::add_property(vertex1, boost::property_map<CustomVertex, CustomAttribute>::value_type("Label 1", 1));
boost::add_property(vertex2, boost::property_map<CustomVertex, CustomAttribute>::value_type("Label 2", 2));
boost::add_property(vertex3, boost::property_map<CustomVertex, CustomAttribute>::value_type("Label 3", 3));

// 输出顶点属性
std::cout << "Vertex 1 attribute: " << vertex1.attribute << std::endl;
std::cout << "Vertex 2 attribute: " << vertex2.attribute << std::endl;
std::cout << "Vertex 3 attribute: " << vertex3.attribute << std::endl;