Write in c++

1. Simple Linked List Class Using an appropriate definition of ListNode, design a simple linked list class with only two member functions and a default constructor: void add (double x)i boolean isMember (double x); LinkedList The add function adds a new node containing x to the front (head) of the list, while the isMember function tests to see if the list contains a node with the value x. Test your linked list class by adding various numbers to the list and then testing for membership