C++ Code Creates Class Of List Needed To Be Updated (Coursework Sample)

#include
using namespace std;
#include
class Node{
public: int get(){return object;} ;//
void set(int object){this->object=object;};
Node*getNext(){return nextNode;};
void setNext(Node *nextNode){this->nextNode=nextNode;};
private: int object;
Node*nextNode;
};
//the list class
class List{
public:
List();
void add(int addObject);
int get();
bool next();
friend void traverse(List list);
friend List addNodes();
void addProgram();
private:
int size;
Node*headNode;
Node*currentNode;
Node*lastCurrentNode;
};
//constructor implementation
List::List(){
headNode=new Node();
headNode->setNext(NULL);
currentNode=NULL;
lastCurrentNode=NULL;
size=0;
}
//add() class method implementation
void List::add(int addObject)
{
Node*newNode=new Node();
newNode->set(addObject);
if(currentNode!=NULL){
newNode->setNext(newNode->getNext());
currentNode->setNext(newNode);
lastCurrentNode=currentNode;
currentNode=newNode;
}
else
{
newNode->setNext(NULL);
headNode->setNext(newNode);
lastCurrentNode=headNode;
currentNode=newNode;
}
size++;
}
//get classmethod
int List::get()
{
if(currentNode!=NULL)
return currentNode->get();
}
//next() class method
bool List::next()
{
if(currentNode==NULL)return false;
lastCurrentNode=currentNode;
currentNode=currentNode->getNext();
if(currentNode==NULL||size==0)
return false;
else
return true;
}
//friend function to treverse linked list