#include using namespace std; struct ListNode { string data; ListNode *next; }; int main() { ListNode *ptr, list; list = new ListNode; list->data = "New York"; ptr - new ListNode; ptr->data - "Boston"; list->next - ptr; ptr->next= new ListNode; ptr->next->data - "Houston"; ptr->next->next = nullptr; // new code goes here Which of the following code correctly deletes the last node the list when added at point of insertion indicated above? O delete ptr->next; ptr->next = nullptr;; O ptr = list: while (ptr != nullptr) ptr = ptr->next; delete ptr; ptr = last; delete ptr; list->next->next = nullptr; delete ptr;

#include using namespace std; struct ListNode { string data; ListNode next; }; int main() { ListNode ptr, list; list = new ListNode; list->data = "New York"; ptr - new ListNode; ptr->data - "Boston"; list->next - ptr; ptr->next= new ListNode; ptr->next->data - "Houston"; ptr->next->next = nullptr; // new code goes here Which of the following code correctly deletes the last node the list when added at point of insertion indicated above? O delete ptr->next; ptr->next = nullptr;; O ptr = list: while (ptr != nullptr) ptr = ptr->next; delete ptr; ptr = last; delete ptr; list->next->next = nullptr; delete ptr;

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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The ListInterface defines two constructors.
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