linked-list.c

#include <stdio.h>
#include <stdlib.h>

struct node {
    int data;          
    struct node *next; 
}*head;


void createList(int n);
int countNodes();

int main()
{
    int n, total;

    printf("Enter the total number of nodes: ");
    scanf("%d", &n);
    createList(n);

    total = countNodes();

    printf("\nTotal number of nodes = %d\n", total);

    return 0;
}


void createList(int n)
{
    struct node *newNode, *temp;
    int data, i;

    head = (struct node *)malloc(sizeof(struct node));

    if(head == NULL)
    {
        printf("Unable to allocate memory.");
    }
    else
    {
        printf("Enter the data of node 1: ");
        scanf("%d", &data);

        head->data = data; 
        head->next = NULL; 

        temp = head;

        
        for(i=2; i<=n; i++)
        {
            newNode = (struct node *)malloc(sizeof(struct node));

           
            if(newNode == NULL)
            {
                printf("Unable to allocate memory.");
                break;
            }
            else
            {
                printf("Enter the data of node %d: ", i);
                scanf("%d", &data);

                newNode->data = data; 
                newNode->next = NULL; 
                temp->next = newNode; 
            }
        }

        printf("SINGLY LINKED LIST CREATED SUCCESSFULLY\n");
    }
}


int countNodes()
{
    int count = 0;
    struct node *temp;

    temp = head;

    while(temp != NULL)
    {
        count++;
        temp = temp->next;
    }

    return count;
}