14 using std::cout;
29     cout << "Priority Queue: popped elements" << endl;  in basic_interface()
30     cout << pq.top() << " "; // 3  in basic_interface()
32     cout << pq.top() << " "; // 2  in basic_interface()
34     cout << pq.top() << " "; // 1  in basic_interface()
36     cout << endl;  in basic_interface()
54     cout << "Priority Queue: iteration" << endl;  in iterator_interface()
56         cout << *it << " "; // 1, 2, 3 in unspecified order  in iterator_interface()
57     cout << endl;  in iterator_interface()
75     cout << "Priority Queue: ordered iteration" << endl;  in ordered_iterator_interface()
77         cout << *it << " "; // 3, 2, 1 (i.e. 1, 2, 3 in heap order)  in ordered_iterator_interface()
78     cout << endl;  in ordered_iterator_interface()
102     cout << "Priority Queue: merge" << endl;  in merge_interface()
103     cout << "first queue: ";  in merge_interface()
105         cout << pq.top() << " "; // 5 4 3 2 1 0  in merge_interface()
108     cout << endl;  in merge_interface()
110     cout << "second queue: ";  in merge_interface()
112         cout << pq2.top() << " "; // 4 2 0  in merge_interface()
115     cout << endl;  in merge_interface()
138     cout << "Priority Queue: merge" << endl;  in heap_merge_algorithm()
139     cout << "first queue: ";  in heap_merge_algorithm()
141         cout << pq.top() << " "; // 5 4 3 2 1 0  in heap_merge_algorithm()
144     cout << endl;  in heap_merge_algorithm()
146     cout << "second queue: ";  in heap_merge_algorithm()
148         cout << pq2.top() << " "; // 4 2 0  in heap_merge_algorithm()
151     cout << endl;  in heap_merge_algorithm()
171     cout << "Priority Queue: update" << endl;  in mutable_interface()
173         cout << pq.top() << " "; // 7, 4, 0  in mutable_interface()
176     cout << endl;  in mutable_interface()
201     cout << "Priority Queue: update with fixup" << endl;  in mutable_fixup_interface()
203         cout << pq.top() << " "; // 7, 4, 0  in mutable_fixup_interface()
206     cout << endl;  in mutable_fixup_interface()
241     cout << std::setw(2);  in main()
244     cout << endl;  in main()
247     cout << endl;  in main()
250     cout << endl;  in main()
253     cout << endl;  in main()
256     cout << endl;  in main()