Which of the following loops correctly uses iter as an iterator to move through the nodes of the linked list?
NodePtr iter; //a pointer to a node
A) whileiter != NULL) iter++;
B) whileiter != NULL) iter=iter-link;
C) foriter=NULL; iter != NULL; iter=iter-link)
D) for iter=head; iter != NULL; iter=iter-link)

Question

Which of the following loops correctly uses iter as an iterator to move through the nodes of the linked list?
NodePtr iter; //a pointer to a node
A) whileiter != NULL) iter++;
B) whileiter != NULL) iter=iter->link;
C) foriter=NULL; iter != NULL; iter=iter->link)
D) for iter=head; iter != NULL; iter=iter->link)

Quizplus · Accepted Answer

Option D correctly initializes iter to the head of the linked list and then moves it through the nodes using iter->link. Options A and C incorrectly try to move iter itself to the next node, while option B moves iter through the links of the nodes without starting at the head.

Which of the Following Loops Correctly Uses Iter as an Iterator