Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live. Martin Golding
Write a program to pairwise swap the elements in the singly linked list. The singly linked list contain the data and link to next node in each node. Iterate each node from linked list and swap the nodes pairwise. Example 1->2->3-4>5 and result should be 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