mid of linked list

To find the middle of a linked list in C++, you can use the slow and fast pointer approach. Here's an explanation for each step:

1. Initialize two pointers, slow and fast, to the head of the linked list.
2. Traverse the linked list using the fast pointer, moving two steps at a time, and the slow pointer, moving one step at a time.
3. When the fast pointer reaches the end of the list (fast->next is NULL or fast is NULL), the slow pointer will be at the middle of the list.
4. Return the node pointed to by the slow pointer as the middle of the linked list.