Join the social network of Tech Nerds, increase skill rank, get work, manage projects...
 
  • Implement Doubly LinkList Using C

    • 0
    • 0
    • 0
    • 0
    • 0
    • 0
    • 0
    • 0
    • 417
    Comment on it

    Doubly Linklist:- In Singly Linklist we have to move only in forward direction. we don't move in backward direction in linklist but Using Doubly Linklist we can iterate in both forward and backward direction. The Below code will shown you how to create the doubly linklist.

    In case of Doubly Linklist we have to use *prev pointer to move in backward direction and *next pointer which help us to move in forward direction.

    #include<stdio.h>
    #include<conio.h>
    #include<alloc.h>
    #include<process.h>
    
    struct node
    {
    int info;
    struct node *prev;
    struct node *next;
    };
    
    typedef struct node NODE;
    
    NODE *start=NULL,*node,*p;
    
    void create();
    void display();
    void rev_dis();
    void insert_beg();
    void insert_mid();
    void insert_end();
    void main()
    {
    int a;
    clrscr();
    
    
        while(1)
        {
    
            printf("\n\t1:=Create LinkList");
               printf("\n\t2:=Reverse Display");
            printf("\n\t3:=Display an Element");
            printf("\n\t4:=Exit");
            printf("\n\t5:=Insert an Element at Middle");
            printf("\n\t6:=Insert an Element at Beginning");
               printf("\n\t7:=Insert an Element at End");
    
            printf("\n\n\tEnter your choice:=");
            scanf("%d",&a);
    
            switch(a)
            {
                case 1:
                create();
                break;
    
                case 2:
                rev_dis();
                break;
    
                case 3:
                display();
                break;
    
                case 4:
                exit(1);
    
                case 5:
                  insert_mid();
                 break;
    
                case 6:
                   insert_beg();
                  break;
    
                case 7:
                insert_end();
                break;
    
                default :
                printf("\n\n\tyou have entered wrong choice");
             }
        }
    getch();
    }
    
    void create()
    {
    
    node=(NODE *)malloc(sizeof(NODE));
    printf("\n\tEnter the Element:=");
    scanf("%d",&node->info);
    
    
        if(start==NULL)
        {
            node->prev=NULL;
            node->next=NULL;
            start=node;
            p=node;
        }
    
        else
        {
            node->prev=p;
            node->next=NULL;
            p->next=node;
            p=node;
    
        }
    }
    
    void display()
    {
    node=start;
        while(node!=NULL)
        {
            printf("%d \n",node->info);
            node=node->next;
        }
    }
    
    void rev_dis()
    {
    NODE *temp;
    temp=p;
    node=temp;
        while(node!=NULL)
        {
            printf("%d \n",node->info);
            node=node->prev;
        }
    }
    
    void insert_beg()
    {
    
        node=(NODE *)malloc(sizeof(NODE));
        printf("\n\tEnter the Element:=");
        scanf("%d",&node->info);
    
        node->prev=NULL;
    
        node->next=start;
        start->prev=node;
    
        start=node;
    }
    
    void insert_mid()
    {
    int flag=0;
    int num;
    NODE *t;
    t=start;
    
           printf("\n\tEnter the location of a No. u want insert after:=");
           scanf("%d",&num);
    
           while(t!=NULL)
           {
            if(num==t->info)
            {
                flag=1;
                node=(NODE *)malloc(sizeof(NODE));
                printf("\n\tEnter the Element:=");
                scanf("%d",&node->info);
    
                 node->next=t->next;
                 node->next->prev=node;
                 node->prev=t;
                 t->next=node;
    
                break;
            }
            else
            {
                t=t->next;
            }
    
           }
    
           if(flag==0)
           printf("\n\tElement Not Inside the Linklist \n");
    }
    
    void insert_end()
    {
         node=(NODE *)malloc(sizeof(NODE));
         printf("\n\tEnter the Element:=");
         scanf("%d",&node->info);
    
        node->next=NULL;
    
    
        node->prev=p;
        p->next=node;
        p=node;
    }
    

 0 Comment(s)

Sign In
                           OR                           
                           OR                           
Register

Sign up using

                           OR                           
Forgot Password
Fill out the form below and instructions to reset your password will be emailed to you:
Reset Password
Fill out the form below and reset your password: