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insert-linked-list.c
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insert-linked-list.c
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#include<stdio.h>
#include<stdlib.h>
struct Node *createLinkedList(int arr[], int size);
// Start insert data/node in the linked list
void insertAtBeginning(struct Node *head, int data);
void printList(struct Node *head);
void insertAtEnd(struct Node *head, int data);
struct Node {
int data;
struct Node *next;
};
int main()
{
int a[] = {5, 10, 15, 20};
struct Node *head;
head = createLinkedList(a, 4);
print(head);
// insert at beginning
//insertAtBeginning(head, 40);
// Insert end
insertAtEnd(head, 100);
return 0;
}
// Beginning insert
void insertAtBeginning(struct Node *head, int data)
{
struct Node *temp = (struct Node*)malloc(sizeof(struct Node));
temp->data = data;
temp->next = head;
struct Node *newHead = temp;
struct Node *current = newHead;
while(current != NULL)
{
printf("%d -> ", current->data);
current = current->next;
}
printf("NULL\n");
}
void insertAtEnd(struct Node *head, int data){
struct Node *current = head;
while(current->next != NULL)
{
current = current->next;
}
struct Node *temp = (struct Node*)malloc(sizeof(struct Node));
temp->data = data;
temp->next = NULL;
current->next = temp;
printList(head);
}
void printList(struct Node *head){
struct Node *current;
while(current != NULL)
{
printf("%d -> ", current->data);
current = current->next;
}
printf("NULL\n");
}
struct Node *createLinkedList(int arr[], int size)
{
struct Node *head = NULL, *temp = NULL, *current = NULL;
int i;
for(i = 0; i < size; i++)
{
temp = (struct Node *)malloc(sizeof(struct Node));
temp->data = arr[i];
temp->next = NULL;
if(head == NULL)
{
head = temp;
current = temp;
}
else{
current->next = temp;
current = current->next;
}
}
return head;
}