C Program to delete an element from any given position of a given SLL | C Program

 Deletion at any position | SLL | C Program

 #include<stdio.h>

#include<stdlib.h>

struct node
{
    int data;
    struct node *next;
};
struct node *start=NULL;

main()
{
    int i,value,ne,pos,invalid;  // ne=Number of element in list, pos= position
    struct node *n,*temp,*del;

    n=malloc(sizeof(struct node));
  
    printf("\n\n\tHow many value do you want to Enter in List: ");
    scanf("%d",&ne);

    printf("\nEnter first data for list: ");
    scanf("%d",&value);

    n->data=value;
    n->next=NULL;
    start=n;

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

        printf("Enter next data: ");
        scanf("%d",&value);

        n->data=value;
        n->next=NULL;
        temp=start;

        while(temp->next!=NULL)
            temp=temp->next;

        temp->next=n;
    }

    // for display
    if(start==NULL)
        printf("\n\t** List is empty **");

    else
    {
        temp=start;

        printf("\n\tData in the List: ");

        while(temp!=NULL)
        {
            printf("%d\t",temp->data);
            temp=temp->next;
        }
    }

    //for Deleting at any position
    printf("\n\n\tWhich position do you want to Delete: ");
    scanf("%d",&pos);
    temp=start;
    if(pos==1)
    {
        start=start->next;
        free(temp);
    }
    else
    {
        for(i=1;i<pos-1;i++)
        {
            if(start==NULL)
                printf("List is empty");
            else
                temp=temp->next;

            if(temp->next==NULL)
                break;
        }
        if(temp->next==NULL)
        {
            invalid=1;
            printf("\n\t\t*** Invalid Position ***");
        }
        else
        {
            del=temp->next;
            temp->next=del->next;
            free(del);
        }
    }



    // for display
    if(start==NULL)
        printf("\n\t** List is empty **");

    else
    {
        if(invalid==1)
            printf("\n\t** Could not Delete Data due to invalid position **");

        else
        {
            if(pos==1)  //for print deleted position
                printf("\n\n\t** %dst position deleted successfully **",pos);
            else
                if(pos==2)
                    printf("\n\n\t** %dnd position deleted successfully **",pos);
            else
                if(pos==3)
                    printf("\n\n\t** %drd position deleted successfully **",pos);
            else
                printf("\n\n\t** %dth position deleted successfully **",pos);
        }

            temp=start;

            printf("\n\n\tUpdated List:  ");

            while(temp!=NULL)
            {
                printf("%d\t",temp->data);
                temp=temp->next;
            }
    }
    getch();
}
OUTPUT: