ASSIGNMENT 5 data structures
name - prathamesh walvekar
roll no- 14
prn -2122000117
singly linked list implementation:-
#include <stdio.h>
#include <stdlib.h>
// Create a node
struct Node {
int data;
struct Node* next;
};
void insertAtBeginning(struct Node** head_ref, int new_data) {
struct Node* new_node = (struct Node*)malloc(sizeof(struct Node));
new_node->data = new_data;
new_node->next = (*head_ref);
(*head_ref) = new_node;
}
void insertAfter(struct Node* prev_node, int new_data) {
if (prev_node == NULL) {
printf("the given previous node cannot be NULL");
return;
}
struct Node* new_node = (struct Node*)malloc(sizeof(struct Node));
new_node->data = new_data;
new_node->next = prev_node->next;
prev_node->next = new_node;
}
void insertAtEnd(struct Node** head_ref, int new_data) {
struct Node* new_node = (struct Node*)malloc(sizeof(struct Node));
struct Node* last = *head_ref; /* used in step 5*/
new_node->data = new_data;
new_node->next = NULL;
if (*head_ref == NULL) {
*head_ref = new_node;
return;
}
while (last->next != NULL) last = last->next;
last->next = new_node;
return;
}
void deleteNode(struct Node** head_ref, int key) {
struct Node *temp = *head_ref, *prev;
if (temp != NULL && temp->data == key) {
*head_ref = temp->next;
free(temp);
return;
}
while (temp != NULL && temp->data != key) {
prev = temp;
temp = temp->next;
}
if (temp == NULL) return;
prev->next = temp->next;
free(temp);
}
int searchNode(struct Node** head_ref, int key) {
struct Node* current = *head_ref;
while (current != NULL) {
if (current->data == key) return 1;
current = current->next;
}
return 0;
}
void sortLinkedList(struct Node** head_ref) {
struct Node *current = *head_ref, *index = NULL;
int temp;
if (head_ref == NULL) {
return;
} else {
while (current != NULL) {
index = current->next;
while (index != NULL) {
if (current->data > index->data) {
temp = current->data;
current->data = index->data;
index->data = temp;
}
index = index->next;
}
current = current->next;
}
}
}
void printList(struct Node* node) {
while (node != NULL) {
printf(" %d ", node->data);
node = node->next;
}
}
int main() {
struct Node* head = NULL;
insertAtEnd(&head, 1);
insertAtBeginning(&head, 2);
insertAtBeginning(&head, 3);
insertAtEnd(&head, 4);
insertAfter(head->next, 5);
printf("Linked list: ");
printList(head);
printf("\nAfter deleting an element: ");
deleteNode(&head, 3);
printList(head);
int item_to_find = 3;
if (searchNode(&head, item_to_find)) {
printf("\n%d is found", item_to_find);
} else {
printf("\n%d is not found", item_to_find);
}
sortLinkedList(&head);
printf("\nSorted List: ");
printList(head);
}
DOUBLY LINKED LIST IMPLEMENTATION:-
