queue.push(std::make_pair(3,false)); queue.push(std::make_pair(7,true)); std::cout<<std::boolalpha;while(!queue.empty()) {constauto& p =queue.top(); std::cout<< p.first <<""<< p.second <<"\n"; queue.pop(); } } 1, 首先这里的my_comp是一个对象,由于每个lambda对象都有...
priority_queue with deque // Use of function greater sorts the items in ascending order typedef deque<int, allocator<int> > INTDQU; typedef priority_queue<int,INTDQU, greater<int> > INTPRQUE; // Using priority_queue with vector // Use of function less sorts the items in descending order...
<< endl; // The third member function declares a priority_queue // with a vector base container and specifies that the comparison // function greater is to be used for ordering elements priority_queue <int, vector<int>, greater<int> > q3; q3.push( 2 ); q3.push( 1 ); q3.push( ...
// pqueue_ctor.cpp// compile with: /EHsc#include<queue>#include<vector>#include<deque>#include<list>#include<iostream>intmain( ){usingnamespacestd;// The first member function declares priority_queue// with a default vector base containerpriority_queue <int> q1;cout<<"q1 = ( ";while( ...
// Check whether the priority queue is empty inline auto empty() const { return size() == 0; } // Get the comparison function inline Compare& cmp() { return cmp_; } inline const Compare& cmp() const { return cmp_; } protected: ...
PriorityBlockingQueue优先级队列,线程安全(添加、读取都进行了加锁)、无界、读阻塞的队列,底层采用的堆结构实现(二叉树),默认是小根堆,最小的或者最大的元素会一直置顶,每次获取都取最顶端的数据。 队列创建 小根堆 PriorityBlockingQueue<Integer> concurrentLinkedQueue =newPriorityBlockingQueue<Integer>(); ...
std::uses_allocator<std::priority_queue> (C++11) specializes the std::uses_allocator type trait (function template) 例 二次 代码语言:javascript 复制 #include <functional> #include <queue> #include <vector> #include <iostream> template<typename T> void print_queue(T& q) { while(!q.empty...
Remove element from the Priority Queue We can remove an element from thepriority_queueusing thepop()method. This removes the element with the highest priority. #include<iostream>#include<queue>usingnamespacestd;// function prototype for display_priority_queue()voiddisplay_priority_queue(priority_queu...
How to use pairs on priority queue and custom function Here in this blog i will take help you to how to implement priority queue on pairs using custom comparators, You will have difficult finding this on internet as it took a lot of effort to find the correct working code which works for...
The C++ priority_queue::empty function is used to check whether the priority_queue is empty or not. It returns true if the size of the priority_queue is ...