C++ - C++ Queues Part 4: Different Types of Queues in C++

There are specialized types of queues in C++ for different use cases.

Examples

Priority Queue (std::priority_queue)

std::priority_queue<int> pq;

pq.push(30);

pq.push(10);

pq.push(20);

std::cout << pq.top(); // Output: 30 (Highest priority element)

Explanation: A priority queue arranges elements in descending order by default.

Deque as a Queue (std::deque)

std::deque<int> myDeque;

myDeque.push_back(10);

myDeque.push_front(5);

std::cout << myDeque.front(); // Output: 5

Explanation: A deque allows elements to be added/removed from both ends.

Queue with list as Underlying Container

std::queue<int, std::list<int>> listQueue;

listQueue.push(100);

listQueue.push(200);

std::cout << listQueue.front(); // Output: 100

Explanation: You can customize a queue's underlying container for specific performance needs.