Complete TODOs in c++ #include #include "QueueLL.hpp" using namespace std; QueueLL::QueueLL() { queueFront = nullptr; queueEnd = nullptr; } QueueLL::~QueueLL() { while( !isEmpty() ) dequeue(); } bool QueueLL::isEmpty() { /*if(queueFront == nullptr || queueEnd == nullptr) return true; return false;*/ return (!queueFront || !queueEnd); } // TODO void QueueLL::enqueue(int key) { Node *nn = newNode; nn->key = key; nn->next = nullptr; // TODO Complete this function, handle the case when you're enqueuing in an empty queue } //TODO void QueueLL::dequeue() { if(!isEmpty()) { // TODO Complete this function, handle the case when your queue becomes empty after dequeuing } else{ cout<<"queue is empty. can not deque"<key; else { cout<<" queue is empty. can not peek"<
Complete TODOs in c++ #include #include "QueueLL.hpp" using namespace std; QueueLL::QueueLL() { queueFront = nullptr; queueEnd = nullptr; } QueueLL::~QueueLL() { while( !isEmpty() ) dequeue(); } bool QueueLL::isEmpty() { /*if(queueFront == nullptr || queueEnd == nullptr) return true; return false;*/ return (!queueFront || !queueEnd); } // TODO void QueueLL::enqueue(int key) { Node *nn = newNode; nn->key = key; nn->next = nullptr; // TODO Complete this function, handle the case when you're enqueuing in an empty queue } //TODO void QueueLL::dequeue() { if(!isEmpty()) { // TODO Complete this function, handle the case when your queue becomes empty after dequeuing } else{ cout<<"queue is empty. can not deque"<key; else { cout<<" queue is empty. can not peek"<
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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Concept explainers
Types of Linked List
A sequence of data elements connected through links is called a linked list (LL). The elements of a linked list are nodes containing data and a reference to the next node in the list. In a linked list, the elements are stored in a non-contiguous manner and the linear order in maintained by means of a pointer associated with each node in the list which is used to point to the subsequent node in the list.
Linked List
When a set of items is organized sequentially, it is termed as list. Linked list is a list whose order is given by links from one item to the next. It contains a link to the structure containing the next item so we can say that it is a completely different way to represent a list. In linked list, each structure of the list is known as node and it consists of two fields (one for containing the item and other one is for containing the next item address).
Question
Complete TODOs in c++
#include <iostream>
#include "QueueLL.hpp"
using namespace std;
QueueLL::QueueLL()
{
queueFront = nullptr;
queueEnd = nullptr;
}
QueueLL::~QueueLL()
{
while( !isEmpty() )
dequeue();
}
bool QueueLL::isEmpty()
{
/*if(queueFront == nullptr || queueEnd == nullptr)
return true;
return false;*/
return (!queueFront || !queueEnd);
}
// TODO
void QueueLL::enqueue(int key)
{
Node *nn = newNode;
nn->key = key;
nn->next = nullptr;
// TODO Complete this function, handle the case when you're enqueuing in an empty queue
}
//TODO
void QueueLL::dequeue()
{
if(!isEmpty())
{
// TODO Complete this function, handle the case when your queue becomes empty after dequeuing
}
else{
cout<<"queue is empty. can not deque"<<endl;
}
}
int QueueLL::peek()
{
if( !isEmpty() )
returnqueueFront->key;
else
{
cout<<" queue is empty. can not peek"<<endl;
return -1;
}
//return 0;
}
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