How do I implement a deque in C++?

How do I implement a deque in C++?

To implement a deque in C++, you can use the std::deque class from the Standard Template Library (STL). It allows for efficient insertion and deletion at both ends.

Can you show me a simple example of using std::deque?

Sure! Here's a basic example:

#include <iostream>
#include <deque>

int main() {
    std::deque<int> d;
    d.push_back(1);
    d.push_front(2);
    d.push_back(3);

    for (int n : d) {
        std::cout << n << ' ';
    }
    return 0;
}

What are the advantages of using a deque over a vector?

The main advantages of a deque over a vector are that it allows for efficient insertion and deletion at both ends, while a vector only allows efficient operations at the end.

Are there any limitations I should be aware of?

Yes, while deques are versatile, they may have slightly higher overhead compared to vectors due to their dynamic nature and memory allocation strategy.