In this blog post, we will discuss how to clone a queue in C++. A queue is a linear data structure that follows the FIFO (First-In-First-Out) principle. Cloning a queue means creating an identical copy of the original queue, including all its elements.

To clone a queue, we need to perform the following steps:

1. Create a new queue.
2. Iterate through the original queue and enqueue each element into the new queue.

Let’s see the code implementation of the cloning process in C++.

#include <iostream>
#include <queue>

using namespace std;

// Function to clone a queue
queue<int> cloneQueue(queue<int> originalQueue) {
    queue<int> clonedQueue;

    // Iterate through the original queue
    while (!originalQueue.empty()) {
        // Enqueue each element into the cloned queue
        clonedQueue.push(originalQueue.front());
        originalQueue.pop();
    }

    return clonedQueue;
}

int main() {
    queue<int> originalQueue;
    originalQueue.push(1);
    originalQueue.push(2);
    originalQueue.push(3);

    // Clone the original queue
    queue<int> clonedQueue = cloneQueue(originalQueue);

    // Print the cloned queue
    while (!clonedQueue.empty()) {
        cout << clonedQueue.front() << " ";
        clonedQueue.pop();
    }

    return 0;
}

In the above code, we define a cloneQueue function that takes the original queue as a parameter and returns a cloned queue. We create a new queue called clonedQueue and iterate through the original queue. During each iteration, we enqueue the front element of the original queue into the cloned queue and then remove it from the original queue.

In the main function, we create an original queue and populate it with some elements. Then, we call the cloneQueue function, passing the original queue as an argument, and store the returned cloned queue in clonedQueue. Finally, we print the cloned queue to verify that the cloning process was successful.

By following the steps mentioned above and using the provided code, you can easily clone a queue in C++.