Why should the **head in insert_atFront function has two asterisk (*)?
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- Why should the **head in insert_atFront function has two asterisk (*)?
- Why should the searchNode return a pointer?
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- C++ problem #include <iostream> #include <string> using namespace std; class node { public: string data; node* next; }; //Print all items from first to end of list void printList(node* first) { } int main() { //Create a new node with data "Tiger" node* T; T = new node; (*T).data = "Tiger"; //Create a node with "Monkey" node* M; M = new node; (*M).data = "Monkeykey"; //Now, hook T's next field to point to M. (*T).next = M; //Let's create a "Whale" node node* W; W = new node; (*W).data = "Whale"; //Hook M's next to W (*M).next = W; //Let's create a "Dpg" node node* D; D = new node; (*D).data = "Dog"; //Let's hook W's next to D (*W).next = D; //Make next point of last item //point to nothing (null) (*D).next = nullptr; // Step 1: printList(T); //Print: Tiger Monkey Whale Dog // Step 2: create function that removes last item from…#ifndef LLCP_INT_H#define LLCP_INT_H #include <iostream> struct Node{ int data; Node *link;};void DelOddCopEven(Node*& headPtr);int FindListLength(Node* headPtr);bool IsSortedUp(Node* headPtr);void InsertAsHead(Node*& headPtr, int value);void InsertAsTail(Node*& headPtr, int value);void InsertSortedUp(Node*& headPtr, int value);bool DelFirstTargetNode(Node*& headPtr, int target);bool DelNodeBefore1stMatch(Node*& headPtr, int target);void ShowAll(std::ostream& outs, Node* headPtr);void FindMinMax(Node* headPtr, int& minValue, int& maxValue);double FindAverage(Node* headPtr);void ListClear(Node*& headPtr, int noMsg = 0); // prototype of DelOddCopEven of Assignment 5 Part 1 #endif#include <bits/stdc++.h> using namespace std; // Structure of a Node struct Node { int data;s struct Node *next; struct Node *prev; }; // Function to insert at the end void insertEnd(struct Node** start, int value) { // If the list is empty, create a single node // circular and doubly list if (*start == NULL) { struct Node* new_node = new Node; new_node->data = value; new_node->next = new_node->prev = new_node; *start = new_node; return; } // If list is not empty /* Find last node */ Node *last = (*start)->prev; // Create Node dynamically struct Node* new_node = new Node; new_node->data = value; // Start is going to be next of new_node new_node->next = *start; // Make new node previous of start (*start)->prev = new_node; // Make last preivous of new node new_node->prev = last; // Make new node next of old last last->next = new_node; } // Function to insert Node at the beginning // of the List, void insertBegin(struct…
- Multiple choice in data structures void doo(node<int>*root){ if(root !=0) { node<int>*p=root; while(root->next!=0) root=root->next; p->data=root->data; } What is this code do? a. swap the first item with the last item in the linked list b. set the first item in the linked list as the last item c. doesn't do anything because the root parameter is passed by value d. change the root item in the binary tree with the farthest leaf itemstruct remove_from_front_of_dll { // Function takes no parameters, removes the book at the front of a doubly // linked list, and returns nothing. void operator()(const Book& unused) { //// TO-DO (13) |||| // Write the lines of code to remove the book at the front of "my_dll", // // Remember, attempting to remove an element from an empty data structure is // a logic error. Include code to avoid that. ///// END-TO-DO (13) //// } std::list& my_dll; };C++ Given code #include <iostream>using namespace std; class Node {public:int data;Node *pNext;}; void displayNumberValues( Node *pHead){while( pHead != NULL) {cout << pHead->data << " ";pHead = pHead->pNext;}cout << endl;} //Option 1: Search the list// TODO: complete the function below to search for a given value in linked lsit// return true if value exists in the list, return false otherwise. ?? linkedlistSearch( ???){ } //Option 2: get sum of all values// TODO: complete the function below to return the sum of all elements in the linked list. ??? getSumOfAllNumbers( ???){ } int main(){int userInput;Node *pHead = NULL;Node *pTemp;cout<<"Enter list numbers separated by space, followed by -1: "; cin >> userInput;// Keep looping until end of input flag of -1 is givenwhile( userInput != -1) {// Store this number on the listpTemp = new Node;pTemp->data = userInput;pTemp->pNext = pHead;pHead = pTemp;cin >> userInput;}cout <<"…
- C++ Program #include <iostream>#include <cstdlib>#include <ctime>using namespace std; int getData() { return (rand() % 100);} class Node {public: int data; Node* next;}; class LinkedList{public: LinkedList() { // constructor head = NULL; } ~LinkedList() {}; // destructor void addNode(int val); void addNodeSorted(int val); void displayWithCount(); int size(); void deleteAllNodes(); bool exists(int val);private: Node* head;}; // function to check data exist in a listbool LinkedList::exists(int val){ if (head == NULL) { return false; } else { Node* temp = head; while (temp != NULL) { if(temp->data == val){ return true; } temp = temp->next; } } return false;} // function to delete all data in a listvoid LinkedList::deleteAllNodes(){ if (head == NULL) { cout << "List is empty, No need to delete…data structers c languagestruct node{ int a; struct node * nextptr; }; Write two functions. One for inserting new values to a link list that uses the given node structure. void insert(struct node **head, int value); Second function is called to count the number of even numbers in the link list. It returns an integer that represents the number of even numbers. int countEvenNumbers(struct node *head); Write a C program that reads a number of integers from the user and insert those integers into a link list (use insert function). Later pass the head pointer of this link list to a function called countEvenNumbers. This function counts and returns the number of even numbers in the list. The returned value will be printed on the screen. Note 1: Do not modify the function prototypes. Sample Input1: Sample Output1: 45 23 44 12 37 98 33 35 -1 3 Sample Input2: Sample Output2: 11 33 44 21 22 99 123 122 124 77 -1 4
- prg-1 #include <iostream>using namespace std; struct Node { int data; Node* left; Node* right;}; Node* newNode(int data) { Node* node = new Node; node->data = data; node->left = NULL; node->right = NULL; return node;} void printInorder(Node* node) { if (node == NULL) return; printInorder(node->left); cout << node->data << " "; printInorder(node->right);} void printPreorder(Node* node) { if (node == NULL) return; cout << node->data << " "; printPreorder(node->left); printPreorder(node->right);} void printPostorder(Node* node) { if (node == NULL) return; printPostorder(node->left); printPostorder(node->right); cout << node->data << " ";} int main() { Node* root = newNode(70); root->left = newNode(60); root->left->left = newNode(58); root->left->right = newNode(62); root->left->left->left =…73% void showLinked() Linked_List "p; p=List; while(pl=NULL) { coutname agephoneN0ID_NOnext; cout>k; for(int i=0;i>nam; couts>ag: cout>ph: couts>id; InserFront(nam,ag.ph,id); coutsd; for (int i=0;istruct nodeType { int infoData; nodeType * next; }; nodeType *first; … and containing the values(see image) Using a loop to reach the end of the list, write a code segment that deletes all the nodes in the list. Ensure the code performs all memory ‘cleanup’ functions.SEE MORE QUESTIONS