11.7 MultipleInheritance_Platypus.cpp

#include <iostream>
using namespace std;

class Animal
{
public:
	Animal()
	{
		cout << "Animal constructor" << endl;
	}

	int age;
};

class Mammal :public Animal
{
};

class Bird :public Animal
{
};

class Reptile :public Animal
{
};

class Platypus :public Mammal, public Bird, public Reptile
{
public:
	Platypus()
	{
		cout << "Platypus constructor" << endl;
	}
};

int main()
{
	Platypus duckBilledP;

	// uncomment next line to see compile failure
	// age is ambiguous as there are three instances of base Animal 
	// duckBilledP.age = 25;

	duckBilledP.Mammal::age = 25;
	duckBilledP.Bird::age = 25;
	duckBilledP.Reptile::age = 25;

	return 0;
}