Question

Consider the following code: struct ListNode { int value; struct ListNode *next; }; ListNode *head; // List head pointer Assume a linked list has been created and head points to the first node. Write code that traverses the list displaying the contents of each node’s value member.

   Consider the following code:
struct ListNode
{
int value;
struct ListNode *next;
};
ListNode *head; // List head pointer
Assume a linked list has been created and head points to the first node. Write code that traverses the list displaying the contents of each node’s value member.
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Starting out with C++: From Control Structures through Objects
Starting out with C++: From Control Structures through Objects
Tony Gaddis 10th Edition
Chapter 18, Problem 21 ↓

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This pointer will start at the head of the list. We can call this pointer `current`.  Show more…

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Consider the following code: struct ListNode { int value; struct ListNode *next; }; ListNode *head; // List head pointer Assume a linked list has been created and head points to the first node. Write code that traverses the list displaying the contents of each node’s value member.
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Key Concepts

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Linked Lists
A linked list is a linear data structure in which elements, called nodes, are connected using pointers. Each node holds data and a reference to the next node, which enables dynamic memory allocation and efficient insertion or deletion operations.
Node Structure
The node structure defines the basic unit of a linked list. It typically contains data attributes and one or more pointers to other nodes. Understanding the node structure is essential as it encapsulates both the data and connectivity required to form the list.
Pointers
Pointers are variables that store memory addresses, and they are fundamental to creating dynamic data structures like linked lists. In a linked list, pointers are used to link nodes together, enabling traversal from one node to the next and manipulation of the list structure.
List Traversal
List traversal involves visiting each node in a linked list sequentially. This is usually achieved by initializing a pointer to the first node and iteratively accessing each subsequent node until the end of the list (a null pointer) is reached, allowing operations such as display or search to be performed on node data.

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12.15 LAB: Output a linked list Write a recursive function called PrintLinkedList that outputs the integer value of each node in a linked list. Function PrintLinkedList has one parameter, the head node of a list. The main program reads the size of the linked list, followed by the values in the list. Assume the linked list has at least 1 node. Ex: If the input of the program is: 5 1 2 3 4 5 the output of the PrintLinkedList function is 1, 2, 3, 4, 5. Hint: Output the value of the current node, then call the PrintLinkedList function repeatedly until the end of the list is reached. Refer to the IntNode class to explore any available member functions that can be used for implementing the PrintLinkedList function.

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