#include
#include
using namespace std;
class Customer {
	protected:
	string name;
	public:
	(1) boll isNil() = 0;
	(2) string getName() = 0;
}
;
class RealCustomer (3) {
	public:
	RealCustomer(string name) {
		this->name=name;
	}
	bool isNil() {
		return false;
	}
	string getName() {
		return name ;
	}
}
;
class NullCustomer (4) {
	public:
	bool isNil() {
		return true;
	}
	string getName() {
		return "Not Available in Customer Database";
	}
}
;
class Customerfactory {
	public:
	string names[3]= {
		"rob", "Joe","Julie"
	}
	;
	public:
	Customer* getCustomer(string name) {
		for (int i = 0; i <3; i++) {
			if (names[i].(5) ) {
				return new RealCustomer(name);
			}
		}
		return (6);
	}
}
;
class CRM {
	public:
	void getCustomer() {
		Customerfactory* (7);
		Customer* customer1 = cf->getCustomer("Rob");
		Customer* customer2 = cf->getCustomer("Bob");
		Customer* customer3 = cf->getCustomer("Julie");
		Customer* customer4 = cf->getCustomer("Laura");
		cout<<"Customers"< cout()< cout()< cout()< cout()< delete cf;
	}
}
;
int main() {
	CRM* crs = new CRM();
	crs->getCustomer();
	delete crs;
	return 0;
}