In the following search function for a linked list using the Node and NodePtr as defined in the text), why is there code to check if here is NULL?
NodePtr searchNodePtr head, int target)
{
NodePtr here = head;
Ifhere == NULL)
{
Return NULL;
}
Else
{
While here-data != target && here-link != NULL)
{
Here = here-link;
}
Ifhere-data == target)
{
Return here;
}
Else
{
Return NULL;
}
}
}
A) the list may be empty
B) the list may be full
C) there is no reason for that code to be there
D) A and B

Question

In the following search function for a linked list using the Node and NodePtr as defined in the text), why is there code to check if here is NULL?
NodePtr searchNodePtr head, int target)
{
NodePtr here = head;
Ifhere == NULL)
{
Return NULL;
}
Else
{
While here->data != target && here->link != NULL)
{
Here = here->link;
}
Ifhere->data == target)
{
Return here;
}
Else
{
Return NULL;
}
}
}
A) the list may be empty
B) the list may be full
C) there is no reason for that code to be there
D) A and B

Quizplus · Accepted Answer

The check for `here == NULL` is necessary to handle the case where the linked list is empty, meaning `head` is `NULL`. This prevents the function from attempting to access members of a `NULL` pointer, which would result in undefined behavior.

In the Following Search Function for a Linked List Using