what is the output of the following segments of code?

QueueType queue; int item1 = 1, item2 = 0, item3 = 4; queue.enQueue(item2); queue.enQueue(item1); queue.enQueue(item1+item3); item2 = queue.deQueue(); queue.enQueue(item3 * item3); queue.enQueue(item2); queue.enQueue(3); item1 = queue.deQueue(); cout << item1 << endl << item2 << endl << item3 << endl; while(!queue.isEmpty()) { item1 = queue.deQueue(); cout << item1 << endl; }