For a long time it puzzled me how something so expensive, so leading edge, could be so useless. And then it occurred to me that a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are, in short, a perfect match. Bill Bryson
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