#include <iostream>
using namespace std;
 
int giid = 0;
 
class animal {
public:
	int id;
	int iid;
	animal(int _id = 0) {
		cout << "construindo um animal..." << endl;
		id = _id;
		iid = giid++;
	}
 
};
 
class gato: public animal {
public:
	gato(animal a) {
		id = a.id;
		cout << "construtor chamado automaticamente, meaw" << endl;
	}
};
 
int main() {
    animal a;
	gato xano = a;
 
	cout << "instance id do animal " << a.iid << endl;
	cout << "instance id do xano " << xano.iid << endl;
	return 0;
}

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