Interview Question for Software Engineering Intern at Cisco Systems:

#include <iostream>
#include <conio.h>
using namespace std;
struct link
{
    int data;
    link* next;
};
class linklist
{
    private:
        link* first;
    public:
        linklist()
        {
            first=NULL;
        }
        void additem(int d)
        {
            link* newlink=new link;
            newlink->data=d;
            newlink->next=first;
            first=newlink;
        }
        void display()
        {
            link* current=first;
            while(current!=NULL)
            {
                cout<<current->data<<endl;
                current=current->next;
            }
        }
};
int main()
{
    linklist li;
    li.additem(25);
    li.additem(36);
    li.additem(49);
    li.additem(64);
    li.display();
    getch();
    return 0;
}