Chapter 17, Problem 35RQE

Program Plan Intro

Purpose of the given code:

The given code is trying to destroy the members of a linked list by using a destructor. A destructor is called when the program ends or the destructor function calls.

Given Code:

//Definition of destructor

NumberList::~NumberList()//Line 1

{//Line 2

//Declaration of structure pointer variables

ListNode *nodePtr, *nextNode;//Line 3

//Storing "head" pointer into "nodePtr"

nodePtr = head;//Line 4

//loop

while (nodePtr != nullptr)//Line 5

{//Line 6

//Assign address of next into "nextNode"

nextNode = nodePtr->next;//Line 7

//Error

nodePtr->next=nullptr;//Line 8

//Assign nextNode into "nodePtr"

nodePtr = nextNode;//Line 9

}//Line 10

}//Line 11