优先队列！

#include<stdio.h>
#include<functional>
#include<queue>
#include<vector>
using namespace std;
//定义结构，使用运算符重载,自定义优先级1
struct cmp1
{
    bool operator ()(int &a,int &b)
    {
        return a>b;//最小值优先
    }
};
struct cmp2
{
    bool operator ()(int &a,int &b)
    {
        return a<b;//最大值优先
    }
};
//定义结构，使用运算符重载,自定义优先级2
struct number1
{
    int x;
    bool operator < (const number1 &a) const
    {
        return x>a.x;//最小值优先
    }
};
struct number2
{
    int x;
    bool operator < (const number2 &a) const
    {
        return x<a.x;//最大值优先
    }
};
int a[]= {14,10,56,7,83,22,36,91,3,47,72,0};
number1 num1[]= {14,10,56,7,83,22,36,91,3,47,72,0};
number2 num2[]= {14,10,56,7,83,22,36,91,3,47,72,0};

int main()
{
    priority_queue<int>que;//采用默认优先级构造队列

    priority_queue<int,vector<int>,cmp1>que1;//最小值优先
    priority_queue<int,vector<int>,cmp2>que2;//最大值优先

    priority_queue<int,vector<int>,greater<int> >que3;//注意“>>”会被认为错误，
    //这是右移运算符，所以这里用空格号隔开
    priority_queue<int,vector<int>,less<int> >que4;////最大值优先

    priority_queue<number1>que5;
    priority_queue<number2>que6;

    int i;
    for(i=0; a[i]; i++)
    {
        que.push(a[i]);
        que1.push(a[i]);
        que2.push(a[i]);
        que3.push(a[i]);
        que4.push(a[i]);
    }
    for(i=0; num1[i].x; i++)
        que5.push(num1[i]);
    for(i=0; num2[i].x; i++)
        que6.push(num2[i]);


    printf("采用默认优先关系:\n(priority_queue<int>que;)\n");
    printf("Queue 0:\n");
    while(!que.empty())
    {
        printf("%3d",que.top());
        que.pop();
    }
    puts("");
    puts("");

    printf("采用结构体自定义优先级方式一:\n(priority_queue<int,vector<int>,cmp>que;)\n");
    printf("Queue 1:\n");
    while(!que1.empty())
    {
        printf("%3d",que1.top());
        que1.pop();
    }
    puts("");
    printf("Queue 2:\n");
    while(!que2.empty())
    {
        printf("%3d",que2.top());
        que2.pop();
    }
    puts("");
    puts("");
    printf("采用头文件\"functional\"内定义优先级:\n(priority_queue<int,vector<int>,greater<int>/less<int> >que;)\n");
    printf("Queue 3:\n");
    while(!que3.empty())
    {
        printf("%3d",que3.top());
        que3.pop();
    }
    puts("");
    printf("Queue 4:\n");
    while(!que4.empty())
    {
        printf("%3d",que4.top());
        que4.pop();
    }
    puts("");
    puts("");
    printf("采用结构体自定义优先级方式二:\n(priority_queue<number>que)\n");
    printf("Queue 5:\n");
    while(!que5.empty())
    {
        printf("%3d",que5.top());
        que5.pop();
    }
    puts("");
    printf("Queue 6:\n");
    while(!que6.empty())
    {
        printf("%3d",que6.top());
        que6.pop();
    }
    puts("");
    return 0;
}