图循环未终止

Question

这是邻接表的表示。当我尝试打印图形时，循环不会终止，并且会不断重复重复怪异的值。循环中出了什么问题

#include<iostream>
#include<list>
using namespace std;

class Graph{
    int V;
    list<int> *l;
public:
    Graph(int v){
        V=v;
        l=new list<int>[V];//Array of linked lists
    }
    void addEdge(int u,int v, bool bidirec=true){
        l[u].push_back(v);
        if(bidirec){//condition for bidirectional graph
            l[v].push_back(u);
        }
    }

    void printAdjList(){
        for(int i=0;i<V;i++){
                cout<<i<<"-->";
            for(int vertex:l[i]){//For each loop
                cout<<vertex<<",";
            }
            cout<<endl;
        }
    }
};

int main(){
    Graph g(5);//graph with 5 vertices
    g.addEdge(0,1);//adding edges
    g.addEdge(0,4);
    g.addEdge(4,3);
    g.addEdge(1,4);
    g.addEdge(1,2);
    g.addEdge(2,3);
    g.printAdjList();
    return 0;
}