问初始化构造函数中的向量数组

EN

class Graph
{

private:
    int vertices;
    std::vector<int> adj[];
public:
    Graph(int v); //constructor
    // add an edge
    void addEdge(int u, int v);
    //print bfs traversal of graph
    void bfs(int s); // s is a source from where bfs traversal should 
                     //start

};

Graph :: Graph(int v)
{
   vertices = v;
}