#includeusing namespace std; int main() { queue q; if(q.empty()) { cout << "Queue is empty"; } return 0; }
#includeOutput: "Queue is not empty" Package Library: Standard Template Library (STL)using namespace std; int main() { queue q; q.push(5); if(q.empty()) { cout << "Queue is empty"; } else { cout << "Queue is not empty"; } return 0; }