// other functions omitted... void insert (const Item áx, int i) { // Copy this function in the answer and write code below this line. };
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- Having trouble with creating the InsertAtEnd function in the ItemNode.h file below. " // TODO: Define InsertAtEnd() function that inserts a node // to the end of the linked list" Given main(), define an InsertAtEnd() member function in the ItemNode class that adds an element to the end of a linked list. DO NOT print the dummy head node. Ex. if the input is: 4 Kale Lettuce Carrots Peanuts ------------------------------------------------------- main.cpp -------------------------------------------------------- #include "ItemNode.h" int main() { ItemNode *headNode; // Create intNode objects ItemNode *currNode; ItemNode *lastNode; string item; int i; int input; // Front of nodes list headNode = new ItemNode(); lastNode = headNode; cin >> input; for (i = 0; i < input; i++) { cin >> item;…You are going to implement a program that creates an unsorted list by using a linked list implemented by yourself. NOT allowed to use LinkedList class or any other classes that offers list functions. It is REQUIRED to use an ItemType class and a NodeType struct to solve this homework. The “data.txt” file has three lines of data 100, 110, 120, 130, 140, 150, 160 100, 130, 160 1@0, 2@3, 3@END You need to 1. create an empty unsorted list 2. add the numbers from the first line to list using putItem() function. Then print all the current keys to command line in one line using printAll(). 3. delete the numbers given by the second line in the list by using deleteItem() function. Then print all the current keys to command line in one line using printAll().. 4. putItem () the numbers in the third line of the data file to the corresponding location in the list. For example, 1@0 means adding number 1 at position 0 of the list. Then print all the current keys to command line in one…Direction: Continue the code below and add case 4, case 5, and case 6. Add 3 more functions aside from insert, getValue, and clear from List ADT import java.util.LinkedList; import java.util.Scanner; class SampleLL { } public static void main(String[] args) { LinkedList 11s = new LinkedList(); String msg = "Choose a function: \n [1] Insert, [2]Get Value, [3]Clear, [0] Exit"; System.out.println(msg); Scanner scan= new Scanner(System.in); int choice scan.nextInt (); while(true) { } if (choice =0) { } System.exit(0); switch(choice) { } case 1: System.out.println("Enter a word/symbol:"); break; case 2: System.out.println("Enter a number: "); break; 11s.add(scan.next()); break; case 3 11s.clear(); default: System.out.println("Invalid input!"); break; System.out.println(11s.get (scan.nextInt())); System.out.println(msg); choice scan.nextInt ();
- A business that sells dog food keeps information about its dog food products in a linked list. The list is named dogFoodList. (This means dogFoodList points to the first node in the list.) A node in the list contains the name of the dog food (a String), a dog food ID (also a String) and the price (a double.) a.) Create a class for a node in the list. b.) Use this class to write pseudocode or Java for a public method that prints the name of all dog foods in the list where the price is more than $20.00.LAB: Inserting an integer in descending order (doubly-linked list) Given main() and an IntNode class, complete the IntList class (a linked list of IntNodes) by writing the insertInDescendingOrder() method to insert new IntNodes into the IntList in descending order. Ex. If the input is: 3 4 2 5 1 6 7 9 8 -1 the output is: 9 8 7 6 5 4 3 2 1 ______________________________ import java.util.Scanner; public class SortedList { public static void main (String[] args) {Scanner scnr = new Scanner(System.in);IntList intList = new IntList();IntNode curNode;int num; num = scnr.nextInt(); while (num != -1) {// Insert into linked list in descending order curNode = new IntNode(num);intList.insertInDescendingOrder(curNode);num = scnr.nextInt();}intList.printIntList();}} __________________________________ public class IntList {// Linked list nodespublic IntNode headNode;public IntNode tailNode; public IntList() {// Front of nodes listheadNode = null;tailNode = null;} // appendpublic void…Write the copyReversed function in the following LinkedList class, which holds ints. This function should create and return a LinkedList object, which is in the reversed order of the list pointed to by this. class LinkedList { private: class Node{ public: int data; Node next; Node (int data_): next (NULL), data(data_) {} Node (int data_, Node * next_): next(next_), data (data_) {} }; Node head; public: LinkedList copyReversed () const {
- Implement a LinkedList class that stores integers using dynamic memory and a proper main program to test it. The following member functions need to be properly implemented and tested: 1. Default constructor. 2. Parmetrized Constructor. 3. Sum. 4. Average. 5. InsertAtHead. 6. InsertAtTail. 7. Delete. 8. Pop. 9. Circular. 10. Display. Sample answer is also provided.LAB: Inserting an integer in descending order (doubly-linked list) Given main() and an IntNode class, complete the IntList class (a linked list of IntNodes) by writing the insertInDescendingOrder() method to insert new IntNodes into the IntList in descending order. Ex. If the input is: 3 4 2 5 1 6 7 9 8 -1 the output is: 9 8 7 6 5 4 3 2 1 public class IntList {// Linked list nodes public IntNode headNode;public IntNode tailNode; public IntList() {// Front of nodes list headNode = null;tailNode = null;} // append public void append(IntNode newNode) {if (headNode == null) { // List empty headNode = newNode;tailNode = newNode;}else {tailNode.nextNode = newNode;newNode.prevNode = tailNode;tailNode = newNode;}} // prepend public void prepend(IntNode newNode) {if (headNode == null) { // list empty headNode = newNode;tailNode = newNode;}else {newNode.nextNode = headNode;headNode.prevNode = newNode;headNode = newNode;}}// insertAfter public void insertAfter(IntNode curNode, IntNode…Write a Python code using the given function and conditions. Do not use Numpy. Use LinkedList Manipulation. Given function: def insert(self, newElement, index) Pre-condition: The list is not empty. Post-condition: This method inserts newElement at the given index of the list. If an element with the same key as newElement value already exists in the list, then it concludes the key already exists and does not insert the key. [You must also check the validity of the index].
- You may find a doubly-linked list implementation below. Our first class is Node which we can make a new node with a given element. Its constructor also includes previous node reference prev and next node reference next. We have another class called DoublyLinkedList which has start_node attribute in its constructor as well as the methods such as: 1. insert_to_empty_list() 2. insert_to_end() 3. insert_at_index() Hints: Make a node object for the new element. Check if the index >= 0.If index is 0, make new node as head; else, make a temp node and iterate to the node previous to the index.If the previous node is not null, adjust the prev and next references. Print a message when the previous node is null. 4. delete_at_start() 5. delete_at_end() . 6. display() the task is to implement these 3 methods: insert_at_index(), delete_at_end(), display(). hint on how to start thee code # Initialize the Node class Node: def __init__(self, data): self.item = data…A deque (pronounced “deck”) is a list-based collection that allows additions and removals to take place at both ends. A deque supports the operations addFront(x), removeFront( ), addRear(x), removeRear( ), size( ), and empty( ). Write a class that implements a deque that stores strings using a doubly linked list below. Demonstrate your class with a graphical user interface that allows users to manipulate the deque by typing appropriate commands in a JTextField component, and see the current state of the deque displayed in a JTextArea component. Consult the documentation for the JTextArea class for methods you can use to display each item in the deque on its own line. ########################################################################################################################## import java.util.Objects; public class DoublyLinkedList<E> {Node head;DoublyLinkedList() {head = new Node(null, null, null);} /** Appending the first item in the list **/public Node addFirst(E…5. The following function indexCounter aims to find and return all the indices of the element x in a list L. if x is not in the list L, return an empty list. However, the implementation has a flaw, so that many times it will return error message. Can you fix the flaw? def indexCounter(L, x): indexList [] startIndex = 0 while startIndex < len(L): indexList.append (L.index (x, startIndex)) startIndex = L.index (x, startIndex) + 1 return indexList