c++ priority_queue
priority_queue<int, vector<int>, greater<int> > gq
c++ priority_queue
priority_queue<int, vector<int>, greater<int> > gq
priority queue cpp
// using GCC 10.2 (C++2a) compiler
#include <functional>
#include <queue>
#include <vector>
#include <iostream>
template<typename T> void print_queue(T& q) {
while(!q.empty()) {
std::cout << q.top() << " ";
q.pop();
}
std::cout << 'n';
}
int main() {
std::priority_queue<int> q;
for(int n : {1,8,5,6,3,4,0,9,7,2})
q.push(n);
print_queue(q);
std::priority_queue<int, std::vector<int>, std::greater<int> > q2;
for(int n : {1,8,5,6,3,4,0,9,7,2})
q2.push(n);
print_queue(q2);
// Using lambda to compare elements.
auto cmp = [](int left, int right) { return (left ^ 1) < (right ^ 1); };
std::priority_queue<int, std::vector<int>, decltype(cmp)> q3(cmp);
for(int n : {1,8,5,6,3,4,0,9,7,2})
q3.push(n);
print_queue(q3);
}
priority queue in c++
//Shubh'grepper
// Implementation of priority_queue in c++
//queue with elements in decreasing order
priority_queue<int> pq;
// queue with elements in increasing order using compare function inside declaration
priority_queue <int, vector<int>, greater<int> > pq;
//priority_queue of type pair<int, int>
#define pp pair<int, int>
priority_queue <pp, vector<pp>, greater<pp> > pq;
priority queue stl
#include<iostream>
#include<queue>
#include<algorithm>
using namespace std;
int main()
{
priority_queue<int>pq;
int n=5;
while(n--)
{
int val;
cout<<"enter the value you want to insert:"<<endl;
cin>>val;
pq.push(val);
}
priority_queue<int>p;
p.push(100);
p.push(1000);
p.push(3000);
p.push(5000);
pq.swap(p);
while(!pq.empty())
{
cout<<pq.top()<<" ";
pq.pop();
}
return 0;
}
C++ accessing in priority queue
/* Program to access an element of highest priority */
#include<iostream>
#include<queue> //Header-file for queue
using namespace std;
int main()
{
priority_queue<int> p1;
p1.push(35);
p1.push(40);
p1.push(95);
p1.push(25);
cout<<p1.top(); //fetch element of highest
priority(maximum element) i.e 95
}
Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us