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Write a Modular C Programming code for All Operations ( inserting at the beginning & End | deleting from beginning & end | Display & exit) used in Nodes of Singly linked list | Data Structure.
The Programme should be like a Menu card:(using case numbers) The code should do the operation which is given by the user.
Read & Delete the Data given to the node.
Refer to Notes: Notes on Data Structures And Algorithms – Linked List
CODE:
#include<stdio.h>
#include<stdlib.h>
struct node
{
int data;
struct node *next;
};
struct node *head;
struct node* insert_at_beg(struct node *);
struct node* insert_at_end(struct node *);
struct node* delete_at_beg(struct node *);
struct node* delete_at_end(struct node *);
void display(struct node *);
struct node *temp,*temp1,*newnode;
main()
{
int ch;
head=NULL;
while(1)
{
printf("\n+++++++++++++++++++++++++++++++++++++++++++++\n");
printf("1) insert at beginning\n");
printf("2) insert at the end\n");
printf("3) delete from beginning\n");
printf("4) delete from the end\n");
printf("5) display linked list\n");
printf("6) exit\n");
printf("+++++++++++++++++++++++++++++++++++++++++++++");
printf("\n\n-> Enter your choice: ");
scanf("%d",&ch);
switch(ch)
{
case 1:newnode=(struct node*)malloc(sizeof(struct node));
printf("Enter data: ");
scanf("%d",&newnode->data);
head=insert_at_beg(newnode);
break;
case 2: newnode=(struct node*)malloc(sizeof(struct node));
printf("Enter data: ");
scanf("%d",&newnode->data);
head=insert_at_end(newnode);
break;
case 3: if(head==NULL)
printf("The linked list is empty---cant delete\n");
else
{
head=delete_at_beg(head);
}
break;
case 4: if(head==NULL)
printf("The linked list is empty---cant delete\n");
else
{
head=delete_at_end(head);
}
break;
case 5: display(head);break;
case 6: exit(0);break;
default: printf("Invalid choice\n");
}
}
}
struct node* insert_at_beg(struct node *newnode)
{
if(head==NULL)
{
head=newnode;
head->next=NULL;
return(head);
}
else
{
newnode->next=head;
head=newnode;
return(head);
}
}
struct node* insert_at_end(struct node *newnode)
{
if(head==NULL)
{
head=newnode;
head->next=NULL;
return(head);
}
else
{
temp=head;
while(temp->next!=NULL)
{
temp=temp->next;
}
temp->next=newnode;
newnode->next=NULL;
return(head);
}
}
void display(struct node *head)
{
if(head==NULL)
{
printf("The linked list is empty\n");
}
else
{
temp=head;
while(temp!=NULL)
{
printf("%d->",temp->data);
temp=temp->next;
}
printf("\n");
}
}
struct node* delete_at_beg(struct node *head)
{
if(head==NULL)
{
printf("linkded list is empty\n");
}
else
{
if(head->next==NULL)
{
printf("node deleted=%d\n",head->data);
free(head);
head=NULL;
return(head);
}
else
{
temp=head;
head=head->next;
printf("node deleted=%d\n",temp->data);
free(temp);
return(head);
}
}
}
struct node* delete_at_end(struct node *head)
{
if(head==NULL)
{
printf("linkded list is empty\n");
}
else
{
if(head->next==NULL)
{
printf("node deleted=%d\n",head->data);
free(head);
head=NULL;
return(head);
}
else
{
temp=head;
while(temp->next!=NULL)
{
temp1=temp;
temp=temp->next;
}
printf("node deleted=%d\n",temp->data);
free(temp);
temp1->next=NULL;
return(head);
}
}
}
OUTPUT
+++++++++++++++++++++++++++++++++++++++++++++ 1) insert at beginning 2) insert at the end 3) delete from beginning 4) delete from the end 5) display linked list 6) exit +++++++++++++++++++++++++++++++++++++++++++++ -> Enter your choice: 3 the linked list is empty---cant delete +++++++++++++++++++++++++++++++++++++++++++++ 1) insert at the beginning 2) insert at the end 3) delete from beginning 4) delete from the end 5) display the linked list 6) exit +++++++++++++++++++++++++++++++++++++++++++++ -> Enter your choice: 1 Enter data: 10 +++++++++++++++++++++++++++++++++++++++++++++ 1) insert at the beginning 2) insert at the end 3) delete from beginning 4) delete from the end 5) display the linked list 6) exit +++++++++++++++++++++++++++++++++++++++++++++ -> Enter your choice: 2 Enter data: 20 +++++++++++++++++++++++++++++++++++++++++++++ 1) insert at the beginning 2) insert at the end 3) delete from beginning 4) delete from the end 5) display the linked list 6) exit +++++++++++++++++++++++++++++++++++++++++++++ -> Enter your choice: 5 10->20-> +++++++++++++++++++++++++++++++++++++++++++++ 1) insert at the beginning 2) insert at the end 3) delete from beginning 4) delete from the end 5) display the linked list 6) exit +++++++++++++++++++++++++++++++++++++++++++++ -> Enter your choice: 3 node deleted=10 +++++++++++++++++++++++++++++++++++++++++++++ 1) insert at the beginning 2) insert at the end 3) delete from beginning 4) delete from the end 5) display the linked list 6) exit +++++++++++++++++++++++++++++++++++++++++++++ -> Enter your choice: 4 node deleted=20 +++++++++++++++++++++++++++++++++++++++++++++ 1) insert at the beginning 2) insert at the end 3) delete from beginning 4) delete from the end 5) display the linked list 6) exit +++++++++++++++++++++++++++++++++++++++++++++ -> Enter your choice: 6 Process returned 0 (0x0) execution time : 51.699 s Press any key to continue.
© Credits
Pragati Bhat (2)
'H' div
Department of Computer Science
( ) — Number of Contributions!
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