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doubly.cpp
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doubly.cpp
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#include<iostream>
using namespace std;
struct Node
{
int data;
Node* next;
Node* prev;
};
class doubly
{
Node *head,*tail,*nptr;
public:
doubly()
{
head=tail=NULL;
}
/* Node* create(Node *nptr)
{
nptr= new Node;
nptr->next=NULL;
nptr->prev=NULL;
return nptr;
}*/
int data()
{ int a;
cout<<"Enter Data:-";
cin>>a;
return a;
}
void link()
{
nptr= new Node;
nptr->data=data();
nptr->next=NULL;
nptr->prev=NULL;
if(head==NULL)
{
head=tail=nptr;
}
else
{
tail->next=nptr;
nptr->prev=tail;
tail=tail->next;
}
}
void display()
{
Node *np=new Node;
np=tail;
while(np!=NULL)
{
cout<<np->data<<"\n";
np=np->prev;
}
}
};
int main()
{
doubly d1;
for(int i=0;i<4;i++)
{
d1.link();
}
d1.display();
return 0;
}