#include <iostream>

using namespace std;


class linkedListClass {
  friend class realList;
public:

  linkedListClass(int newvalue) {
    dvalue=newvalue;
    next = NULL;
  }

private:
  int dvalue;
  linkedListClass *next;

};

class realList {
public:
  realList() {
    first = NULL;
  }

  realList(int nodevalue) {
    first = new linkedListClass(nodevalue);
  }

  void addbehind(int newvalue) {
    linkedListClass *newnode = new linkedListClass(newvalue);

    if (first == NULL)
      first = newnode;
    else {
      newnode->next = first->next;
      first->next = newnode;
    }

  }

  void addinfront(int newvalue) {
    linkedListClass *newnode = new linkedListClass(newvalue);

    if (first == NULL)
      first = newnode;
    else {
      newnode->next = first;
      first = newnode;
    }
  }


  int getdvalue() {
    if (first == NULL)
      return -1;
    else
      return(first->dvalue);
  }

  void printlist() {
    linkedListClass *currentNode;
    if (first == NULL)
      cout << "The List is currently empty.\n";
    else {
      currentNode = first;
      cout << "\nHere is the current list: \n";
      while (currentNode != NULL) {
	cout << "\tcurrent node is " << currentNode->dvalue << endl;
	currentNode = currentNode->next;
      }
    }

  }


private:

  linkedListClass *first;
};

int main() {

  realList *myList;

  myList= new realList();

  myList->addbehind(23);


  cout << "From main: \n\tthe value is " << myList->getdvalue() << endl;

  myList->addbehind(45);
  myList->printlist();

  myList->addinfront(10);
  myList->printlist();

  return 0;
}