a problem with pointers

[carter88]

I have a doublylinked-list which i already inserted some values, but when i try to make search&update this loop does not terminate

if(head!=NULL)
    {
        temp = head;
        while(temp!=NULL)
        {
            if(temp->row==i)
                temp->data = 100;
            else
                 temp=temp->next;
        }
    }

although i get 0 when i check tail->next, temp never becomes NULL. How can i solve this problem?

[Dino]

If temp never becomes null, then your list must be self referencing and you are going into a loop.