Data-structure/LinkedList.cpp at main · Yousef-nabil/Data-structure · GitHub

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#include "LinkedList.h"

LinkedList::LinkedList() {
    head = tail = nullptr;
}

void LinkedList::insertAtEnd(int x) {
    node* temp = new node();
    temp->next = nullptr;
    temp->value = x;

    if (head == nullptr) {
        head = tail = temp;
    } else {
        tail->next = temp;
        tail = temp;
    }
}

void LinkedList::insertAtStart(int x) {
    node* temp = new node();
    temp->next = nullptr;
    temp->value = x;

    if (head == nullptr) {
        head = tail = temp;
    } else {
        temp->next = head;
        head = temp;
    }
}

void LinkedList::deleteFirst() {
    if (head) {
        node* temp = head;
        head = head->next;
        delete temp;
        if (head == nullptr)
            tail = nullptr;
    }
}

bool LinkedList::isEmpty() {
    return head == nullptr;
}