prority_queue 的用法 实例

priority_queue<int>;

typedef pair<int,int> pa;
priority_queue<<pa,vector<pa>,greater<pa>> que；

 priority_queue<int,vector<int>,greater<int>> que ;
///其中，第二个函数是容器类型，第三个参数是比较函数

 struct node 
 {
   friend bool operate<() 
    { return  n1.priority<n2.priority(); }
      int priority;
      int value;
 };

 

#include<iostream>
#include<functional>
#include<queue>
using namespace std;
struct node
{
    friend bool operator< (node n1, node n2)
    {
        return n1.priority < n2.priority;
    }
    int priority;
    int value;
};
int main()
{
    const int len = 5;
    int i;
      priority_queue<node> qn;
    node b[len];
    b[0].priority = 6; b[0].value = 1; 
    b[1].priority = 9; b[1].value = 5; 
    b[2].priority = 2; b[2].value = 3; 
    b[3].priority = 8; b[3].value = 2; 
    b[4].priority = 1; b[4].value = 4; 

    for(i = 0; i < len; i++)
        qn.push(b[i]);
    cout<<"优先级"<<‘\t‘<<"值"<<endl;
    for(i = 0; i < len; i++)
    {
        cout<<qn.top().priority<<‘\t‘<<qn.top().value<<endl;
        qn.pop();
    }
    return 0;
}