C++ Program: How to Merge Two Linked List into one

The Method Signature is: Node merge(const Node &list) It should return *this and *this should contain all the elements.

The Node class is as follows

class Node{

int data;

Node next;

}*ptr

public Node()

{

ptr head = nullptr;

}

What I have

Node merge(const Node &list)

{

if(list.head == nullptr)

{

return *this;

}

return *this

}