#include <iostream>
using namespace std;
//base
class IDReader {
public:
	IDReader() { sn=00123; }


private:
	int sn;  //serial number attribute

};

//derived class 1

class IDReaderBasic : public IDReader {
public:
	bool validID(void);
	bool barcodeScanner(void); //helper function for validID
};

bool IDReaderBasic::validID(void)
{
	barcodeScanner();
	return true;
}

bool IDReaderBasic::barcodeScanner(void) 
{
	cout << "beep" << "\a" <<endl;
	return true;
}

//derived class 2

class IDReaderPlus : public IDReader {
public:
	bool validID(void);
	bool IrisScanner(void); //helper function for validID
};

bool IDReaderPlus::validID(void)
{
	IrisScanner();
	return true;
}

bool IDReaderPlus::IrisScanner(void)
{
	cout << "oo you've got nice eyes!" << "\a" << endl;
	return true;
}