text: The constructed linked list is : 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7
code: push ( & start , 7 ) ; push ( & start , 6 ) ; push ( & start , 5 ) ; push ( & start , 4 ) ; push ( & start , 3 ) ; push ( & start , 2 ) ; push ( & start , 1 ) ; printf ( " Linked list before calling swapNodes ( ) " printList ( start ) ; swapNodes ( & start , 4 , 3 ) ; printf ( " Linked list after calling swapNodes ( ) " printList ( start ) ; return 0 ; }