F How To Delete a Node From a Simple Linked List | CodeTheta

How To Delete a Node From a Simple Linked List

January 08, 2014

Here is a link list program this program used by different function. If you find any compilation error please do comment or email me

/* Delete a Node From a Simple Linked List */
/* Dllinklistfrmnode.C */
/* http://native-code.blogspot.com */

# include <stdio.h>
# include <malloc.h>

struct link
{
    char info[20];
    struct link *next;
};

int i;
int number ;
struct link start, *previous;
void  Delete_node(struct link *);
void  creat_node(struct link *);

/* Create linked list */

void creat_node(struct link *node)
{
    char ch;

    i = 0;

    start.next = NULL;  
    // Empty list
        node = &start;      
    // Point to the start of the list

        printf("\n Input choice n for break: ");
    ch = getchar();

    while(ch != 'n')
    {
        node->next = (struct link* ) malloc(sizeof(struct link));
        node = node->next;
        fflush(stdin);
        printf("\n Input the node: %d: ", i+1);
        gets(node->info);
        node->next = NULL;

        printf("\n Input choice n for break: ");
        ch = getchar();

        i++;

    }
    printf("\n Total nodes = %d", i);

    node = start.next;
    printf("\n Created list is as follows:\n");
    while (node)
    {
        printf("\n 0x%x", node);
        printf(" %s", node->info);
        node = node->next;
    }
}

/* Removing a node */

void Delete_node(struct link *node)
{
    int node_number = 1;
    int delete_node;
    node = start.next;
    previous = &start;

    printf("\n Input node number you want to delete:");
    scanf(" %d", &delete_node);

    while(node)
    {
        if((node_number) == delete_node)
        {
            previous->next = node->next;
            free(node);
            break ;
        }
        else
        {
            node = node->next;
            previous = previous->next;
        }
        node_number ++;
    }

    /* Display the list */

    node = start.next;
    printf("\n After deleting a node list is as follows:\n");
    while (node)
    {
        printf("\n 0x%x", node);
        printf(" %s", node->info);
        node = node->next;
    }
}

/* Function main */

void main()
{
    struct link *node = (struct link *) malloc(sizeof(struct link));
    creat_node(node);
    Delete_node(node);
}

/* http://native-code.blogspot.com */ 

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