Find as many mistakes as you can. void NumberList::appendNode(double num) { ListNode *newNode, *nodePtr; // Allocate a new node & store num newNode = new listNode; newNode->value = num; // If there are no nodes in the list // make newNode the first node. if (!head) head = newNode; else // Otherwise, insert newNode. { // Find the last node in the list. while (nodePtr->next) nodePtr = nodePtr->next; // Insert newNode as the last node. nodePtr->next = newNode; } }

Question: Identify the errors in the given C++ function `appendNode` and provide the step-by-step solution to implement the function correctly. Answer: In the provided C++ code snippet, the following errors were detected: 1. Typographical error: The type name should be "ListNode" instead of "listNode". 2. Declaration and initialization error: `nodePtr` needs to be initialized as the head of the list before using it in the while loop. 3. Null-termination error: We should set `newNode->next` to a null pointer, so the list is correctly terminated. To implement the function correctly, we made the following changes: 1. Corrected the typographical error by changing the type name from "listNode" to "ListNode". 2. Initialized `nodePtr` with the head of the list, by adding `nodePtr = head;`. 3. Set `newNode->next` as a null pointer by adding `newNode->next = nullptr;`. The final version of the `appendNode` function was shown in the solution.