How can I implement algorithms using priority queues in C++11?

How can I implement algorithms using priority queues in C++11?

You can use the std::priority_queue from the C++ Standard Library. It allows you to manage a collection of elements with a specific priority.

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

Sure! Here's a basic 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;
}

What are some common algorithms that utilize priority queues?

Common algorithms include Dijkstra's shortest path algorithm, Prim's algorithm for minimum spanning trees, and Huffman coding.

How does the priority queue manage the order of elements?

The priority queue uses a heap data structure, which ensures that the highest (or lowest) priority element is always at the top.