logo CodeStepByStep logo

reverse

Language/Type: C++ linked lists pointers
Author: Marty Stepp (on 2016/08/27)

Write a function named reverse that that accepts as a parameter a reference to a pointer to a ListNode representing the front of a linked list. Your function should reverse the order of the elements in the list. For example, if a variable named list contains {1, 8, 19, 4, 17}, then after a call of list.reverse();, it should store {17, 4, 19, 8, 1}.

Constraints: Do not modify the data field of existing nodes; change the list by changing pointers only. Do not construct any new ListNode objects in solving this problem (though you may create as many ListNode* pointer variables as you like). Do not use any auxiliary data structures to solve this problem (no array, vector, stack, queue, string, etc).

Assume that you are using the ListNode structure as defined below:

struct ListNode {
    int data;         // value stored in each node
    ListNode* next;   // pointer to next node in list (NULL if none)
}
Type your solution here:


This is a function problem. Write a C++ function as described. Do not write a complete program; just the function(s) above.

You must log in before you can solve this problem.


Log In

If you do not understand how to solve a problem or why your solution doesn't work, please contact your TA or instructor.
If something seems wrong with the site (errors, slow performance, incorrect problems/tests, etc.), please

Is there a problem? Contact a site administrator.

© Marty Stepp, all rights reserved.