Before software can be reusable it first has to be usable. Ralph Johnson
Merge two linked lists into one list and return the head node. The second linked list head node link with first linked list tail node. The utility function should return the head node of merged linked list and print the data values.
Print the list of items: 1->2->3->4->NULL Print the list of items: 5->6->7->8->NULL Print the list of items after pairwise Swap: 1->2->3->4->5->6->7->8->NULL