How to use Linked list in C++

//Program in cpp to demonstrate linkedlist, linkedlist.cpp
#include<iostream>
using namespace std;
struct node
        {
        public:
        int data;
        node * next;
        };
class linkedlist
        {
        private:
        node* first;
        public:
        linkedlist()
                {
                first=NULL;
                }
        void getdata(int d);
        void display();
        };
void linkedlist::getdata(int dd)
        {
        node* newnode=new node;
        newnode->data=dd;
        newnode->next=first;
        first=newnode;
        }
void linkedlist::display()
        {
        node* current=first;
        while(current!=NULL)
                {
                cout<<current->data<<endl;
                current=current->next;
                }
        }
int main()
{
linkedlist li;
li.getdata(10);
li.getdata(15);
li.getdata(20);
li.getdata(18);
li.getdata(19);
li.display();
return 0;
}
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