A double linked list may be implemented in a workspace array by utilising only one index next. That is, we do not need to retain a distinct field back in the workspace array nodes to detect the backward linkages. The goal is to add a member workspace[current] into workspace[current] rather than the index of the next element on the list. The difference is the index of the next item less the index of the entry preceding current. We must additionally keep two pointers to subsequent nodes in the list, the current index and the prior index of the node right before current in the linked list. To find the next entry of the list, we calculate workspace[current].difference + previous; Similarly, to find the entry preceding previous, we calculate current − workspace[previous].difference;

A double linked list may be implemented in a workspace array by utilising only one index next. That is, we do not need to retain a distinct field back in the workspace array nodes to detect the backward linkages. The goal is to add a member workspace[current] into workspace[current] rather than the index of the next element on the list. The difference is the index of the next item less the index of the entry preceding current. We must additionally keep two pointers to subsequent nodes in the list, the current index and the prior index of the node right before current in the linked list. To find the next entry of the list, we calculate workspace[current].difference + previous; Similarly, to find the entry preceding previous, we calculate current − workspace[previous].difference;

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter17: Linked Lists

Section: Chapter Questions

Problem 5PE

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In a workspace array, a double linked list may be implemented by utilising just one index next. To locate the backward linkages, we do not need to maintain a distinct field back in the nodes that make up the workspace array. The goal is to insert a member workspace[current] rather than the index of the next item on the list into workspace[current]. difference equals the index of the entry after the current entry less the index of the item before it. We must additionally keep two pointers to subsequent nodes in the list, the current index and the prior index of the node right before current in the linked list.To find the next entry of the list, we calculate workspace[current].difference + previous; Similarly, to find the entry preceding previous, we calculate current − workspace[previous].difference;
Reverse a singly linked list by changing the pointers of the nodes. The datarepresented by the list should continue to remain in the same nodes of the originallist.For example, given a singly linked list START, as shown in Figure P6.9(a), the listneeds to be reversed, as shown in Figure P6.9(b), by manipulating the links alone.
Suppose there are two singly linked lists both of which intersect at some point and become a single linked list. The head or start pointers of both the lists are known, but the intersecting node is unknown. Also, the number of nodes in each of the list before they intersect are unknown and both the list may have it different. List1 may have n nodes before it reaches intersection point and List2 might have m nodes before it reaches intersection point where m and n may be m = n, m > n or m < n. Give an algorithm for finding the merging point. Hints: A brute force approach would be to compare every pointer in one list with every pointer in another list. But in this case the complexity would be O(mn)
For example: Programming generates and modifies linked lists: Typically, the software monitors two nodes: How to utilise the null reference in the node of a linked list in two common scenarios.
Consider the following scenario: a software creates and manipulates a linked list, like follows:The software would normally maintain track of two special nodes, which are as follows: Explanation of how to utilise the null reference in the node of the linked list in two frequent situations?
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