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[R22] Data Structures Lab Manual [ Lab Programs ]


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Aim:

Solution :

C Program to implement Doubly Linked List

Doubly Linked List
#include<stdio.h>
#include<stdlib.h>

struct node{
    struct node *llink;
    int data;
    struct node *rlink;
}*head=NULL,*tail=NULL;

int count()
{
    struct node *temp;
    int i=1;
    temp=head;
    while(temp->rlink!=NULL)
    {
        temp=temp->rlink;
        i++;
    }
    return(i);
}

struct node *create(int value)
{
    struct node *temp;
    temp=(struct node*)malloc(sizeof(struct node));
    temp->data=value;
    temp->rlink=NULL;
    temp->llink=NULL;
    return temp;
}
void insert_begin(int value)
{
    struct node *newnode;
    newnode=create(value);
    if(head==NULL)
    {
        head=tail=newnode;
    }
    else
    {
        newnode->rlink=head;
        head->llink=newnode;
        head=newnode;
    }
}

void insert_end(int value)
{
    struct node *newnode, *temp;
    newnode=create(value);
    if(head==NULL)
    {
        head=tail=newnode;
    }
    else
    {
        newnode->llink=tail;
        tail->rlink=newnode;
        tail=newnode;
    }
}

void insert_pos(int value,int pos)
{
    struct node *newnode, *temp1,*temp2,*temp;
    int i,c=1;
    newnode=create(value);
    i=count();
    if(pos==1)
        insert_begin(value);
    else if(pos>i+1)
    {
        printf("insertion is not posible");
        return;
    }
    else if(pos==i+1)
    {
        insert_end(value);
    }
    else
    {
        temp=head;
        while(c<=pos-1 && temp!=NULL)
        {
            temp=temp->rlink;
            c++;
        }
        temp1=temp->llink;
        temp1->rlink=newnode;
        temp->llink=newnode;
        newnode->llink=temp1;
        newnode->rlink=temp;
    }
}

void delete_begin()
{
    struct node *temp;
    if(head==NULL)
    {
        printf("deletion is not possible");
    }
    else
    {
        temp=head;
        head=head->rlink;
        if(head==NULL)
            tail=NULL;
        else
            head->llink=NULL;
        free(temp);
    }
}
void delete_end()
{
    struct node *temp;
    if(head==NULL)
    {
        printf("deletion is not possible");
    }
    else
    {
        temp=tail;
        tail=tail->llink;
        if(tail==NULL)
            head=NULL;
        else
            tail->rlink=NULL;
        free(temp);
    }
}
void delete_pos(int pos)
{
    struct node *temp1,*temp2,*temp;
    int i,c=1;
    i=count();
    if(pos==1)
        delete_begin();
    else if(pos>i)
    {
        printf("Deletion is not posible");
        return;
    }
    else if(pos==i)
    {
        delete_end();
    }
    else
    {
        temp=head;
        while(c<pos && temp->rlink!=NULL)
        {
            temp=temp->rlink;
            c++;
        }
        temp1=temp->llink;
        temp2=temp->rlink;
        temp1->rlink=temp2;
        temp2->llink=temp1;
        free(temp);
    }
}
void display()
{
    struct node *temp;
    if(head==NULL)
    {
        printf("list is empty");
    }
    else
    {
        temp=head;
        while(temp->rlink!=NULL)
        {
            printf("%d <-> ",temp->data);
            temp=temp->rlink;
        }
        printf("%d",temp->data);
    }
}

void main()
{
    int ch,pos,value;
    do
    {
        printf("\n1.Insert Begin\n2.Insert End\n3.Insert Position\n4.Delete Begin\n5.Delete End\n6.Delete Position\n7.Display\n8.Exit\n");
        printf("Enter your choice: ");
        scanf("%d",&ch);
        switch(ch)
        {
        case 1: printf("Enter the value: ");
                scanf("%d",&value);
                insert_begin(value);
                break;
        case 2: printf("Enter value: ");
                scanf("%d",&value);
                insert_end(value);
                break;
        case 3: printf("Enter value: ");
                scanf("%d",&value);
                printf("Enter position you want to insert: ");
                scanf("%d",&pos);
                insert_pos(value,pos);
                break;
        case 4: delete_begin();
                break;
        case 5: delete_end();
                break;
        case 6: printf("Enter position you want to delete: ");
                scanf("%d",&pos);
                delete_pos(pos);
                break;
        case 7: display();
                break;
        case 8:break;
        default: printf("\nyour choice is wrong!.. ");
        }
    }while(ch!=8);
}

OUTPUT
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 1
Enter the value: 10
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 2
Enter value: 20
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 7
10 <-> 20
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 3
Enter value: 30
Enter position you want to insert: 2
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 7
10 <-> 30 <-> 20
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 3
Enter value: 40
Enter position you want to insert: 4
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 7
10 <-> 30 <-> 20 <-> 40
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 6
Enter position you want to delete: 2
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 7
10 <-> 20 <-> 40
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 4
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 5
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 7
20
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 9
your choice is wrong!.. 
1.Insert Begin
2.Insert End
3.Insert Position
4.Delete Begin
5.Delete End
6.Delete Position
7.Display
8.Exit
Enter your choice: 8

Related Content :

Data Structures Lab Programs

1) Write a program that uses functions to perform the following operations on singly linkedlist.:
i) Creation ii) Insertion iii) Deletion iv) Traversal View Solution

2) Write a program that uses functions to perform the following operations on doubly linkedlist.:
i) Creation ii) Insertion iii) Deletion iv) Traversal View Solution

3) Write a program that uses functions to perform the following operations on circular linkedlist.:
i) Creation ii) Insertion iii) Deletion iv) Traversal View Solution

4) Write a program that implement Stack (its operations) using Array View Solution

5) Write a program that implement Stack (its operations) using Linked List (Pointer) View Solution

6) Write a program that implement Queue(its operations) using Array View Solution

7) Write a program that implement Queue (its operations) using Linked List (Pointer) View Solution

8) Write a program that implements Quick sort sorting methods to sort a given list of integers in ascending order View Solution

9) Write a program that implements Merge sort sorting methods to sort a given list of integers in ascending order View Solution

10) Write a program that implements Heap sort sorting methods to sort a given list of integers in ascending order View Solution

11) Write a program to implement the tree traversal methods using Recursive View Solution

12) Write a program to implement the tree traversal methods using Non Recursive View Solution

13) Write a program to implement Binary Search Tree (its operations) View Solution

14) Write a program to implement AVL Tree (its operations) View Solution

15) Write a program to implement Red - Black Tree (its operations) View Solution

16) Write a program to implement B Trees (its operations) View Solution

17) Write a program to implement B+ Trees (its operations) View Solution

18) Write a program to implement the graph traversal methods (Breadth First Search) View Solution

19) Write a program to implement the graph traversal methods (Depth First Search) View Solution

20) Write a program to Implement a Pattern matching algorithms using Boyer- Moore View Solution

21) Write a program to Implement a Pattern matching algorithms using Knuth-Morris-Pratt View Solution