#include <stdio.h>
#include <stdlib.h>
// Define the structure of a node
struct Node {
int data;
struct Node* next;
};
// Function to create a new node
struct Node* createNode(int data) {
struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
newNode->data = data;
newNode->next = NULL;
return newNode;
}
// Function to insert a node at the beginning
struct Node* insertAtFirst(struct Node* head, int data) {
struct Node* newNode = createNode(data);
newNode->next = head;
return newNode;
}
// Function to display the linked list
void displayList(struct Node* head) {
struct Node* temp = head;
while (temp != NULL) {
printf("%d -> ", temp->data);
temp = temp->next;
}
printf("NULL\n");
}
int main() {
struct Node* head = NULL; // Initially, the list is empty
// Create and insert elements
head = insertAtFirst(head, 10);
head = insertAtFirst(head, 20);
head = insertAtFirst(head, 30);
// Display the list
printf("Linked List: ");
displayList(head);
return 0;
}
