Simple Linked List Program to add a node

1.Simple linkedlist program to add a node at the front using c++ class.

//this is just a basic program to understand how a node is added into a linkedlist. 

#include<iostream.h>

#include<conio.h>

class node

{

public:

int data;

node *next;

node()

{

data=0;

next=NULL;

}

node(int x)

{

data=x;

next=NULL;

}

};

class linked_list

{

node *head;

public:

int addNodeAtFront(node &n);

void display();

linked_list()

{

head=NULL;

}

};

int linked_list::addNodeAtFront(node &n)           /*method declaraction*/

{

int i=0;

n.next=head;                                                /*here adress inside the head is now given to next

head=&n;                                                                  pointer of node class*/

i=1;

return i;

}

void linked_list::display()

{

node *ptr=head;

while(ptr!=NULL)

  {

  cout<<"\t"<<ptr->data;

  ptr=ptr->next;

  }

}

void main()

{

int x,q;

linked_list l;

clrscr();

cout<<"Enter a value:\t";               

cin>>x;

node n(x);

q=l.addNodeAtFront(n);           /*call to addNodeAtFront method of class Linked_list*/

if(q==1)

  {

  cout<<"Inserted";

  l.display();

  }

 getch(); 

}