Question

I was trying to reverse a linked list, however whenever I execute the following function, I get only the last element. For example, if the list contained 11,12,13 earlier. After executing the function, it contains only 13. Kindly point out the bug in my code

---

void reverselist() {
    struct node *a, *b, *c;
    a = NULL;
    b = c = start;

    while (c != NULL) {
        c = b->next;
        b->next = a;
        a = b;
        b = c;
    }
    start = c;
}

Answer 1

c is a helper pointer.

void reverselist()
{
    struct node *a, *b, *c;
    a=NULL;
    b=start;
    while(b!=NULL)
    {
        c=b->next
        b->next=a;
        a=b
        b=c
    }
    start=a;
}