C++ - C++ Queues Part 3: Real-World Applications of Queues

Queues are widely used in computer science applications, such as job scheduling, buffering, and graph traversal.

Examples

Task Scheduling (Simulating a Print Queue)

std::queue printQueue;

printQueue.push("Document1");

printQueue.push("Document2");

printQueue.push("Document3");

while (!printQueue.empty()) {

    std::cout << "Printing: " << printQueue.front() << std::endl;

    printQueue.pop();

}

Explanation: Each document is processed in the order it was added.Handling Customer Service Requests

std::queue<std::string> customerQueue;

customerQueue.push("Customer 1");

customerQueue.push("Customer 2");

std::cout << "Serving: " << customerQueue.front(); // Output: Customer 1

customerQueue.pop();

Explanation: Customers are served in the order they arrive.

Breadth-First Search (BFS)

std::queue<int> bfsQueue;

bfsQueue.push(1); // Start node

while (!bfsQueue.empty()) {

    int node = bfsQueue.front();

    bfsQueue.pop();

    std::cout << "Visited: " << node << std::endl;

}

Explanation: BFS traversal in graphs uses a queue to track nodes.