#includeThis code creates a deque with the values 1-5, then uses the clear function to remove all elements. It then outputs the size of the deque before and after the clear. This std::deque::clear function is part of the standard C++ library, which is included in most C++ development environments.#include int main() { std::deque myDeque {1, 2, 3, 4, 5}; std::cout << "Size of deque before clear: " << myDeque.size() << std::endl; myDeque.clear(); std::cout << "Size of deque after clear: " << myDeque.size() << std::endl; return 0; }