To err is human, but to really foul things up you need a computer. Paul Ehrlich
Write a program to swap alternative nodes in the singly linked list. Linked list node contains data and link to the next node. The utility function takes the linked list head node and returns the swapped linked list head node. The display function iterate all the nodes and display the values.
Ex 1->2->3-4>5 it should swap 2->1->3-4>5.
Print the list of items: 21->52->33->21->67->NULL Print the list of items after pairwise Swap: 52->21->21->33->67->NULL