"No matching function for call" error in linked list

[malibuwiley]

I'm adding a copy constructor and overloaded assignment operator to a linked list header file and implementation file, but I am getting notes and errors from the compiler that I do not understand. Here's the .h file:

#include <cstdlib>

class NumberList
{
private:
   
    int size;                 // Easier for copy constructor and assignment operator

    // Declare a structure for the list
   struct ListNode
   {
      double value;           // The value in this node
      struct ListNode *next;  // To point to the next node
   }; 

   ListNode *head;            // List head pointer
   ListNode *first = head;    // Create first to use in functions without messing with head

public:
   // Constructor
   NumberList()
      { head = NULL; }
   
   // Copy Constructor
   NumberList(const NumberList &);

   // Assignment Operator
   NumberList& operator = (const NumberList&);

   // Destructor
   ~NumberList();
      
   // Linked list operations
   void appendNode(double);
   void insertNode(double);
   void deleteNode(double);
   void displayList() const;
   bool isEmpty(ListNode*);
}; 

Here's the copy constructor function:

NumberList::NumberList(const NumberList &obj)
{
    // Copy list's size into function for use
    int mySize = obj.size;

    // If list's size is 0 create new list with head as null
    if (obj.size == 0) {
        head = NULL;
    }
    else {
        // Do it again to ensure then destruct the list
        mySize = obj.size;
        this->~NumberList();

        // Define nodes for use in function
        ListNode *firstPtr, *lastPtr;

        // Define firstPtr's position at top then move obj's first to a new pointer
        firstPtr = obj.first;
        lastPtr = new ListNode(firstPtr->value);
        first = lastPtr;

        // Traverse the loop while copying it's contents
        while (lastPtr != NULL) {
            lastPtr = new ListNode(firstPtr->value);
            lastPtr = lastPtr->next;
        }
    }
} 

The overloaded assignment operator:

NumberList& NumberList::operator = (const NumberList &obj)
{
    if (this != &obj) {
        this->~NumberList();

        // Copy list's size into function for use
        int mySize = obj.size;

        // If list's size is 0 create new list with head as null
        if (obj.size == 0) {
            head = NULL;
        }
        else {
            // Do it again to ensure then destruct the list
            mySize = obj.size;
            this->~NumberList();

            // Define nodes for use in function
            ListNode *firstPtr, *lastPtr;

            // Define firstPtr's position at top then move obj's first to a new pointer
            firstPtr = obj.first;
            lastPtr = new ListNode(firstPtr->value);

            ListNode *temp;

            // Traverse obj
            while (firstPtr != NULL) {
                // Copy current node's data 
                temp = new ListNode(firstPtr->value);

                // Temp goes to the end of the list
                lastPtr->next = temp;

                // lastPtr goes to the end of the list
                lastPtr = lastPtr->next;

                // Go to next node
                firstPtr = firstPtr->next;
            }
        }
    }
    return *this;
} 

And the errors:

NumberList.cpp:243:47: error: no matching function for call to ‘NumberList::ListNode::ListNode(double&)’
         lastPtr = new ListNode(firstPtr->value);
                                               ^
NumberList.cpp:243:47: note: candidates are:
In file included from NumberList.cpp:4:0:
NumberList.h:13:11: note: NumberList::ListNode::ListNode()
    struct ListNode
           ^
NumberList.h:13:11: note:   candidate expects 0 arguments, 1 provided
NumberList.h:13:11: note: NumberList::ListNode::ListNode(const NumberList::ListNode&)
NumberList.h:13:11: note:   no known conversion for argument 1 from ‘double’ to ‘const NumberList::ListNode&’
NumberList.cpp:248:51: error: no matching function for call to ‘NumberList::ListNode::ListNode(double&)’

It's this error and notes repeated at lines 243, 248, 284, and 291. I know it has something to do with how I'm creating these new nodes but this is the most I could slim those errors down and I have no clue what the response here is. Checking online most people have a "NodePointer" there instead of a node, but I don't know the proper way to define that in the header.

[George P]

A refresher on using code tags:

PLEASE learn to use code tags, they make reading and commenting on source code MUCH easier.

http://www.cplusplus.com/articles/jEywvCM9/
http://www.cplusplus.com/articles/z13hAqkS/

HINT: you can edit your post and add code tags.

Some formatting & indentation would not hurt either

[ne555]

the compiler can't read your mind.
you haven't defined a constructor for ListNode, ¿what should happen when you do new ListNode(42);?
either define such constructor or stop trying to call it.

> most people have a "NodePointer" there instead of a node, but I don't know
> the proper way to define that in the header.
¿? you do have a "node pointer" there.


> this->~NumberList();
suicide is not the answer
if you want to run clean up code, then create a clean_up() function