如何使用C++中的广度优先搜索算法

#include <iostream>
#include <queue>
#include <vector>
using namespace std;

// 图的节点
struct Node {
    int id;
    bool visited;
    vector<Node*> neighbors;
    Node(int _id) : id(_id), visited(false) {}
};

// 广度优先搜索算法
void BFS(Node* start) {
    // 使用队列保存要访问的节点
    queue<Node*> q;
    // 标记起点已经被访问
    start->visited = true;
    q.push(start);

    while (!q.empty()) {
        Node* current = q.front();
        q.pop();
        cout << current->id << " ";

        // 遍历当前节点的相邻节点
        for (Node* neighbor : current->neighbors) {
            // 如果相邻节点未被访问，则标记为已访问并入队
            if (!neighbor->visited) {
                neighbor->visited = true;
                q.push(neighbor);
            }
        }
    }
}

int main() {
    // 创建图的节点
    Node* A = new Node(1);
    Node* B = new Node(2);
    Node* C = new Node(3);
    Node* D = new Node(4);
    Node* E = new Node(5);

    // 构建节点之间的连接关系
    A->neighbors.push_back(B);
    A->neighbors.push_back(C);
    B->neighbors.push_back(A);
    B->neighbors.push_back(D);
    C->neighbors.push_back(A);
    C->neighbors.push_back(D);
    D->neighbors.push_back(B);
    D->neighbors.push_back(C);
    D->neighbors.push_back(E);
    E->neighbors.push_back(D);

    // 从节点A开始进行广度优先搜索
    cout << "BFS traversal starting from node A: ";
    BFS(A);

    return 0;
}