Write the programs for Linked List (Insertion and Deletion)
operations

Answer Posted / arnoldindia

/*OPERATIONS ON SINGLY LINKED LIST*/

#include<stdio.h>
#include<conio.h>
struct link
{
int item;
struct link *next;
};
typedef struct link node;
void addfirst();
void addlast();
void addmid();
void delfirst();
void dellast();
void delmid();
void display();
node *head=NULL;


void main()
{
int ch;
clrscr();
do
{
printf("\nSINGLY LINKED LIST OPERATIONS\n");
printf("\n1.Addfirst\n2.AddMid\n3.AddLast\n4.DeleteFirst\n5.DeleteMiddle\n6.DeleteLast\n7.Display\n8.Exit\n");
printf("Enter your option:\t");
scanf("%d",&ch);
switch(ch)
{
case 1:
addfirst();
display();
break;
case 2:
addmid();
display();
break;
case 3:
addlast();
display();
break;
case 4:
delfirst();
display();
break;
case 5:
delmid();
display();
break;
case 6:
dellast();
display();
break;


case 7:
display();
break;
case 8:
exit(0);
break;
default:
printf("Invalid Choice\n");
}
}
while(ch<=8);
getch();
}


void addfirst()
{
node *temp;
temp=(node *)malloc(sizeof(node));
printf("Enter the data....\t");
scanf("%d",&temp->item);
temp->next=head;
head=temp;
}

void addmid()
{
int i=1,pos;
node *cur=head,*temp;
printf("\nEnter the position\t");
scanf("%d",&pos);
while(pos!=i+1&&cur!=NULL)
{
cur=cur->next;
i++;
}
if(pos==i+1)
{
temp=(node *)malloc(sizeof(node));
printf("Enter the data...");
scanf("%d",&temp->item);
temp->next=cur->next;
cur->next=temp;
}
}


void addlast()
{
node *temp,*cur=head;
temp=(node *)malloc(sizeof(node));
printf("\nEnter the data....");
scanf("%d",&temp->item);
while(cur->next!=NULL)
{
cur=cur->next;
}
temp->next=cur->next;
cur->next=temp;
}


void delfirst()
{
node *temp=head;
head=head->next;
printf("Deleted item is %d\n",temp->item);
free(temp);
}


void delmid()
{
int i=1,pos;
node *cur=head,*temp;
printf("Enter the position to be deleted\t");
scanf("%d",&pos);
while(pos!=i+1&&cur->next!=NULL)
{
cur=cur->next;
i++;
}
if(pos==i+1)
{
temp=cur->next;
cur->next=temp->next;
printf("Deleted item is %d\n",temp->item);
free(temp);
}
}


void dellast()
{
node *temp,*cur=head;
while(cur->next->next!=NULL)
{
cur=cur->next;
}
temp=cur->next;
cur->next=NULL;
printf("Deleted item is %d\n",temp->item);
free(temp);
}


void display()
{
node *cur=head;
printf("\nHead->");
while(cur!=NULL)
{
printf("\t%d",cur->item);
cur=cur->next;
}
printf("<-NULL\n");
}

Is This Answer Correct ?    247 Yes 53 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Define the term “percolate up”?

701


Devise a program to sort an array using bubble sort.

725


Can arraylist store primitives?

630


What is a stable algorithm?

667


Are linked lists considered linear or non-linear data structure?

807


What are lists?

723


Write an algorithm for inserting and deleting an element from doubly linked list?

686


What is data algorithm?

774


List the data structures which are used in rdbms.

683


Which sorting is best in time complexity?

704


Is hashset synchronized?

705


How does a treemap sort?

606


What are the parts of a linked list?

825


Difference between calloc and malloc in data structures?

684


Describe the types of data structures?

734