l2y3

struct Node
{
  Node(int value = 0, Node* n = nullptr)
    : value{value}, next{n}
  {}

  int value;
  Node* next;
};

int main()
{
  Node* first{new Node{5}};
  first->next = new Node{9};
  std::cout << first->value << std::endl;
  std::cout << first->next->value << std::endl;
}