Chapter 17: Problem 1
The __________ points to the first node in a linked list.
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Each of the following member functions for performing an operation on a linked
list of type NumberList has at least one error. Explain what is wrong and how
to fix it.
A) NumberList: :printList ( )
while (head)
cout \(<<\) head- \(>\) value head \(=\) head- \(>\) next
B) NumberList: :printList ( )
ListNode \(\star \mathrm{p}=\) head; while \((\mathrm{p}->\text { next })\)
cout \(<
To indicate that a linked list is empty, you should set the pointer to its head to the value __________.
Using the ListNode structure introduced in this chapter, write a function void printFirst(ListNode *ptr) that prints the value stored in the first node of a list passed to it as parameter. The function should print an error message and terminate the program if the list passed to it is empty.
Write a function ListNode *ListConcat(ListNode *list1, ListNode *list2) That concatenates the items in list2 to the end of list1 and returns the resulting list.
Write a function void printSecond(ListNode *ptr) that prints the value stored in the second node of a list passed to it as parameter. The function should print an error message and terminate the program if the list passed to it has less than two nodes.
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