结构体是C++常用的数据结构，其初始化可以如下：

#include
     
      using namespace std;struct Node{    int M, V;    Node(int a, int b){        M = a;        V = b;    }};int main(){    Node n1(1, 65), n2(5, 23), n3(2, 99);    cout << n1.M << ' ' << n1.V << endl;    cout << n2.M << ' ' << n2.V << endl;    cout << n3.M << ' ' << n3.V << endl;    }
     

 　　此外，结构体还可以重载操作符，如：

#include
     
      using namespace std;struct Node{    int M, V;    Node(int a, int b){        M = a;        V = b;    }    friend bool operator < (const Node n1, const Node n2){        return n1.V < n2.V;    }    friend bool operator > (const Node n1, const Node n2){        return n1.V > n2.V;    }    friend ostream &operator << (ostream &os, const Node n){        os << n.M << ' ' << n.V;        return os;    }};int main(){    Node n1(1, 65), n2(5, 23), n3(2, 99);        if(n1 < n2) cout << n1 << endl;    else cout << n2 << endl;}
     

 　　自然，结构体也可以配合STL一起使用，如配合优先队列使用，注意在只用有优先队列是必须重载小于号，只重载大于号是不可以的：

#include
     
      using namespace std;struct Node{    int M, V;    Node(int a, int b){        M = a;        V = b;    }    friend bool operator < (const Node n1, const Node n2){        return n1.V < n2.V;    }    friend bool operator > (const Node n1, const Node n2){        return n1.V > n2.V;    }    friend ostream &operator << (ostream &os, const Node n){        os << n.M << ' ' << n.V;        return os;    }};int main(){    Node n1(1, 65), n2(5, 23), n3(2, 99);        priority_queue
      
        pq;    pq.push(n1), pq.push(n2), pq.push(n3);        while(!pq.empty()){        Node n = pq.top();        pq.pop();        cout << n << endl;    }}