/*An example of polymorphism*/
#include <iostream>
#include <string>

using namespace std;

class AorBorC { protected: 
public: virtual string type(){return "?";}
};
class A: public AorBorC {
public:  string type(){return "A";}
};
class B: public AorBorC {
public: string type(){return "B";}
};
class C: public AorBorC {
public: string type(){return "C";} 
};

int main()
{	AorBorC x;
	cout << "x.type = "<<x.type() << endl;

	A a;
	cout << "a.type = "<<a.type() << endl;
	B b;
	cout << "b.type = "<<b.type() << endl;
	C c;
	cout << "c.type = "<<c.type() << endl;

	AorBorC *p[]={&a, &b, &c, &x, NULL};

	for ( int i=0; p[i]!=NULL; i++)
		cout << "(p["<<i<<"])->type() = "<< (p[i])->type() << "\n";


	x = a;
	cout << "x.type = "<<x.type() << endl;

	
}