text: Create the doubly linked list : 2 < -> 5 < -> 7 < -> 12 < -> 10 < -> 6 < -> 4 < -> 1
code: push ( & head , 1 ) ; push ( & head , 4 ) ; push ( & head , 6 ) ; push ( & head , 10 ) ; push ( & head , 12 ) ; push ( & head , 7 ) ; push ( & head , 5 ) ; push ( & head , 2 ) ; cout << " Original ▁ Doubly ▁ linked ▁ list : n " ; printList ( head ) ;