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Create Linear Linked List

Thursday, 18 July 2013

Write a Program to create linear linked list.

#include<stdio.h>
#include<stdlib.h>
#define NULL 0

struct linked_list
{
    int number;
    struct linked_list *next;
};
typedef struct linked_list node; /* node type defined */

main()
{
    node *head;
    void create(node *p);
    int count(node *p);
    void print(node *p);

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

    create(head);
    printf("\n");
    printf(head);
    printf("\n");
    printf("\nNumber of items = %d \n", count(head));
}
void create(node *list)
{
    printf("Input a number\n");
    printf("(type -666 at end): ");
    scanf("%d", &list -> number); /* create current node */
    if(list->number == -666)
    {
        list->next = NULL;
    }
    else   /*create next node */
    {
        list->next = (node *)malloc(sizeof(node));
        create(list->next);   */ Recursion occurs */
    }
    return;
}
void print(node *list)
{
    if(list->next != NULL)
    {
        printf("%d-->",list ->number);  /* print current item */
        if(list->next->next == NULL)
        printf("%d", list->next->number);
        print(list->next);    /* move to next item */
    }
    return;
}
int count(node *list)
{
    if(list->next == NULL)
    return (0);
    else
    return(1+ count(list->next));
}

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