10.2.7优先级队列priority_queue
v 最大值优先级队列、最小值优先级队列
v 优先级队列适配器 STL priority_queue
v 用来开发一些特殊的应用,请对stl的类库,多做扩展性学习
priority_queue<int, deque<int>> pq;
priority_queue<int, vector<int>> pq;
pq.empty()
pq.size()
pq.top()
pq.pop()
pq.push(item)
#include <iostream>
using namespace std;
#include "queue"
void main81()
{
priority_queue<int> p1; //默认是 最大值优先级队列
//priority_queue<int, vector<int>, less<int> > p1; //相当于这样写
priority_queue<int, vector<int>, greater<int>> p2; //最小值优先级队列
p1.push(33);
p1.push(11);
p1.push(55);
p1.push(22);
cout <<"队列大小" << p1.size() << endl;
cout <<"队头" << p1.top() << endl;
while (p1.size() > 0)
{
cout << p1.top() << " ";
p1.pop();
}
cout << endl;
cout << "测试 最小值优先级队列" << endl;
p2.push(33);
p2.push(11);
p2.push(55);
p2.push(22);
while (p2.size() > 0)
{
cout << p2.top() << " ";
p2.pop();
}
}
#includeusing namespace std;#include "queue"void main81(){ priority_queue p1;//默认情况下,最大值优先级队列 priority_queue ,less > p2; //提前定义好的预定义函数 谓词 priority_queue ,greater >p3;//最小值优先队列 p1.push(33); p1.push(11); p1.push(55); p1.push(22); cout<<"队列元素"< < 0) { cout< <<" "; p1.pop(); } cout< <<"最小值优先级队列"< 0) { cout< <<" "; p3.pop(); }}void main(){ main81(); cout<<"hello..."<
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