What are priority queue algorithms in C++11?

Can you explain what a priority queue is in C++11?

A priority queue is an abstract data type that operates similar to a regular queue but with an added feature: each element has a priority. Elements with higher priority are served before those with lower priority.

How do I implement a priority queue in C++11?

You can implement a priority queue in C++11 using the std::priority_queue class from the Standard Template Library (STL). It allows you to store elements in a way that the highest priority element is always at the front.

What are some common use cases for priority queues?

Common use cases include scheduling tasks, managing bandwidth in networking, and implementing algorithms like Dijkstra's for shortest paths.

Can you show me a simple code example of a priority queue?

Sure! Here's a simple example:

#include <iostream>
#include <queue>

int main() {
    std::priority_queue<int> pq;
    pq.push(10);
    pq.push(20);
    pq.push(15);

    while (!pq.empty()) {
        std::cout << pq.top() << ' '; // Outputs: 20 15 10
        pq.pop();
    }
    return 0;
}