Thread: error in displaying linked list after deletion from middle-please spot it and tell me

Code:

#include <stdio.h>
#include <stdlib.h>
struct node{
int data;
struct node *next;
};
void main()
{
    struct node *head, *tail, *temp,*s,*ptrl,*p;
    int n,f,i;
    char ch;
    head=tail=NULL;
    printf("want to enter data (y/n)\n");
    scanf("%c",&ch);
    if(ch=='y'||ch=='Y'){
printf("enter your data: \n");
scanf("%d",&n);
fflush(stdin);
        tail=(struct node *)malloc(sizeof(struct node));
        tail->data=n;
        tail->next=NULL;
        head=tail;
    printf("\nwant to enter more data (y/n)");
    scanf("%c",&ch);
fflush(stdin);
    }
 while(ch=='y'||ch=='Y'){
    printf("\nenter your data: ");
scanf("\n%d",&n);
fflush(stdin);
        temp=(struct node *)malloc(sizeof(struct node));
        tail->next=temp;
        temp->data=n;
        temp->next=NULL;
        tail=temp;
printf("\nwant to enter more data (y/n)");
    scanf("\n%c",&ch);
    fflush(stdin);
    }
    printf("\nenter the data you want to delete");
    scanf("\n%d",&f);
    ptrl=head;
s=head;
    while(s!=NULL){
      if(s->data!=f){
        ptrl=s;
          s=s->next;
        }
      else{
        ptrl->next=s->next;
i=1;
      }
    }
    p=head;
    if(i==1){
        printf("\nlist after deletion--->");
    while(p!=NULL){
        printf("%d ",p->data);
        p=p->next;
    }}
    else{
        printf("\nelement not found");
    }
  getch();
}

the error is after :::: " printf("\nenter the data you want to delete");"
please spot it and pull this poor man out of this misery

1.
Declare main as int main(void), not void main() (which is not a standard declaration and yields no benefit). And put a return 0 statement at the end of main.

2.
Remove the fflush(stdin) calls as these are not needed and untrustworthy. They may "work" on some systems, but can cause problems on others.

In order to read a single character that may have whitespace (e.g., a newline) before it, just put a space before the %c in your scanf.

And remove any \n's you have in your scanf's, as they do absolutely nothing in front of %d and are equivalent to a single space in front of %c.

3.
Obviously your indentation and spacing could use some work.

4.
Don't bother casting the return value of malloc as this is unnecessary in C (although it is required in C++, but in C++ you'd be using the new operator instead).

5.
I'm too lazy to describe the errors in your code, so here's a re-write. Please study the differences.

Code:

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

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

int main(void)
{
    struct node *head, *tail, *temp, *prev, *p;
    int n;
    char ch;

    head = tail = NULL;

    printf("Do you want to enter data (y/n) ");
    scanf(" %c", &ch);

    while (ch == 'y' || ch == 'Y') {

        printf("Enter your data: ");
        scanf("%d", &n);

        // Create and initialize new node.
        temp = malloc(sizeof(*temp));
        temp->data = n;
        temp->next = NULL;

        // Attach new node to list.
        if (head == NULL)
            head = tail = temp;
        else
            tail = tail->next = temp;
    
        printf("Want to enter more data (y/n) ");
        scanf(" %c", &ch);
    }


    printf("Enter the data you want to delete: ");
    scanf("%d", &n);
    p = head;
    prev = NULL;
    while (p != NULL && p->data != n) {
        prev = p;
        p = p->next;
    }
    if (p != NULL) {
        if (prev == NULL)
            head = p;
        else
            prev->next = p->next;
        free(p);
    }


    if (p != NULL) {
        printf("List after deletion: ");
        p = head;
        while (p != NULL) {
            printf("%d ", p->data);
            p = p->next;
        }
        putchar('\n');
    } else {
        printf("Element not found.\n");
    }


    return 0;
}