You can assume that p already points to node 14 (I'm not asking you to write a loop to find node 14). Do this without declaring any other variables using only three lines of code.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Write the code fragment that appropriately deletes the node pointed to by p (data value 14) in the doubly linked list shown in the diagram. You can assume that p already points to node 14 (I'm not asking you to write a loop to find node 14). Do this without declaring any other variables using only three lines of code.

The image illustrates a doubly linked list, which is a data structure consisting of a sequence of elements linked in both directions, allowing for efficient bidirectional traversal.

**Components:**

1. **Nodes:** 
   - Each node contains a data part and two references: `previous` and `next`.
   - The nodes visible in the diagram contain the values 12, 14, and 16.

2. **Links:**
   - Arrows show the connections between nodes.
   - Each node has a `previous` pointer that links to the preceding node.
   - Each node has a `next` pointer that links to the following node.

3. **Pointers:**
   - A specific pointer `p:` is shown pointing to the node containing the value 14.
   - This pointer indicates the current node of operation or interest in the linked list.

4. **Directionality:**
   - Arrows denote the direction of each pointer.
   - The arrows flow from the `previous` pointer of a node to the current node, and from the current node to the `next` pointer, demonstrating the two-way linking between nodes.

This doubly linked list structure allows for more flexible data manipulation compared to a singly linked list, as it permits traversal and updates from both ends efficiently.
Transcribed Image Text:The image illustrates a doubly linked list, which is a data structure consisting of a sequence of elements linked in both directions, allowing for efficient bidirectional traversal. **Components:** 1. **Nodes:** - Each node contains a data part and two references: `previous` and `next`. - The nodes visible in the diagram contain the values 12, 14, and 16. 2. **Links:** - Arrows show the connections between nodes. - Each node has a `previous` pointer that links to the preceding node. - Each node has a `next` pointer that links to the following node. 3. **Pointers:** - A specific pointer `p:` is shown pointing to the node containing the value 14. - This pointer indicates the current node of operation or interest in the linked list. 4. **Directionality:** - Arrows denote the direction of each pointer. - The arrows flow from the `previous` pointer of a node to the current node, and from the current node to the `next` pointer, demonstrating the two-way linking between nodes. This doubly linked list structure allows for more flexible data manipulation compared to a singly linked list, as it permits traversal and updates from both ends efficiently.
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