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Program to Implement Triply Linked List in Data Structures (C plus plus)

Program to Implement Triply Linked List in Data Structures (C plus plus)

In this tutorial, we will learn about Program to Implement Triply Linked List in Data Structures (C plus plus).

/*C++ Program to Implement Triply Linked List*/

#include<iostream>
#include<stdio.h>

using namespace std;

int a = 0;

struct node
{
    node *next, *prev, *top;
    int info;
}*head = NULL, *tail = NULL, *p = NULL, *r = NULL, *np = NULL, *q = NULL;

void create(int z)
{
    np = new node;
    np->info =  z;
    np->next = NULL;
    np->prev = NULL;
    np->top = NULL;
    if (a == 0)
    {
        tail = np;
        head = np;
        p = head;
        p->next = NULL;
        p->prev = NULL;
        p->top = NULL;
        a++;
    }
    else
    {
        p = head;
        r = p;
        if (np->info < p->info)
        {
            np->next = p;
            p->prev = np;
            np->prev = NULL;
            head = np;
            p = head;
            do
            {
                p = p->next;
            }
            while (p->next != NULL);
            tail = p;
        }
        else if (np->info > p->info)
        {
            while (p != NULL && np->info > p->info)
            {
                r = p;
                p = p->next;
                if (p == NULL)
                {
                    r->next = np;
                    np->prev = r;
                    np->next = NULL;
                    tail = np;
                    break;
                }   
                else if (np->info <= p->info)
                {
                    if (np->info < p->info)
                    { 
                        r->next = np;
                        np->prev = r;
                        np->next = p;
                        p->prev = np;
                        if (p->next != NULL)
                        {
                            do
                            {
                                p = p->next;
                            }
                        while (p->next !=NULL);
                    }
                    tail = p;
                    break;
                    }
                    else if (p->info == np->info)
                    {
                        q = p;
                        while (q->top != NULL)
                        {
                           q = q->top;
                        }
                        q->top = np;
                        np->top = NULL;
                        break;
                    }
                }
            }
        }        
    }
}

void traverse_tail()
{
    node *t  = tail;
    
    while (t != NULL)
    {
        cout<<t->info<<"\t";
        q = t;
        while (q->top != NULL)
        {
              q = q->top;
              cout<<"top->"<<q->info<<"\t";
        }
        t = t->prev;
    }
    cout<<endl<<endl;
}

void traverse_head()
{
    node *t = head;
    while (t != NULL)
    {
        cout<<t->info<<"\t";
        q = t;
        while (q->top != NULL)
        {
            q = q->top; 
            cout<<"top->"<<q->info<<"\t";
        }
        t = t->next;
    }
    cout<<endl<<endl;
}

int main()
{
    int c = 0, no, value, ch;
    cout<<"Please enter the number of nodes: "<<endl;
    cin>>no;
    while (c < no)
    {
        cout<<endl<<"Enter the value of node: "<<endl;
        cin>>value;
        create(value);
        c++;
    }
    cout<<endl<<"Traversing Doubly Linked List head: "<<endl;
    traverse_head();
    
    cout<<endl<<"Traversing Doubly Linked List tail: "<<endl;
    traverse_tail();
   
   	}

Output:

Program to Implement Triply Linked List in Data Structures (C plus plus)
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