Question

I have just started to practice c++ and I am stuck at one point.
I have a Node class and the class has a constructor like this:

class Node
{
    public:
          Node(std::string,Node *,int,int,int,int);
    private:
          std::string state;
          Node* parent_node;
          int total_cost;
          int path_cost;
          int heuristic_cost;
          int depth;  
}

Node::Node(std::string state,Node *parent_node,int path_cost,int heuristic_cost,int total_cost,int depth)
{
    this->state=state;
    this->parent_node=parent_node;
    this->path_cost=path_cost;
    this->heuristic_cost=heuristic_cost;
    this->total_cost=total_cost;
    this->depth=depth;
}

Everything works ok so far, but I can not create a Node object with a NULL parent_node.
I have tried this:

Node *n = new Node("state name",NULL,0,15,20,1);

I have also tried creating a new object and assigning it as parent_node, but no success either.

Node *temp = new Node();
Node *n = new Node("state name",temp,0,15,20,1);

I am doing something wrong with the pointer but I don’t know what I am missing. I get a compile error which says no matching function call.

Thanks in advance

Answer 1

Is your constructor public?

class Node
{
public:
    Node(std::string,Node *,int,int,int,int);
private:
    std::string state;
    Node* parent_node;
    int total_cost;
    int path_cost;
    int heuristic_cost;
    int depth;  
};

---

Also, don’t forget the semicolon after Node declaration, this is not Java 😉