Program needs to be in C++, please include main function and some comment lines for better understanding.

1. DNode class that can store integer data and the address of next and prev DNode.
2. Introduce a DLL (Doubly Linked List) class
   1. Introduce a front private data member
   2. Introduce a DLL constructor and destructor
   3. Introduce insertToFront function
   4. Introduce deleteFromFront function
   5. Introduce printAll function
   6. Introduce deleteLast function
   7. Introduce insertToMiddle function
   8. Introduce deleteMiddle function
   9. Introduce deleteLastNode function
   10. InsertInOrder function: insert a new node so the list reads in ascending order from the beginning to the end.
   11. removeOneTargetNode(int target) //remove the first target node found in the list
   12. removeAllTargetNodes(int target)// remove all target node(s) found in the list
   13. isDuplicate //return true if there is any node that are duplicate in the list. For example, 1->2->3->4 is a unique SLL. However, 1->2->3->2->1 is duplicate since 1 repeats two times and 2 repeats two times.
3. Introduce a CLL (Doubly Linked List) class and all the above functions.