cpa_lab_5_3_10_(3)-C.cpp

#include <iostream>

using namespace std;

class FarmAnimal
{
    public:
        FarmAnimal(double water_consumption);
        double getWaterConsumption();
    private:
        double water_consumption;
};

FarmAnimal::FarmAnimal(double water_consumption)
{
	this->water_consumption = water_consumption;
}

double FarmAnimal::getWaterConsumption()
{
	return water_consumption;
}

class DummyAnimal : public FarmAnimal
{
    public:
        DummyAnimal();
};

DummyAnimal::DummyAnimal() : FarmAnimal(10.0){}

class DoublingAnimal : public FarmAnimal
{
    public:
        DoublingAnimal(double given_water_consumption);
};

DoublingAnimal::DoublingAnimal(double given_water_consumption) : FarmAnimal(2 * given_water_consumption) {}

void printConsumption(FarmAnimal animal)
{
	cout << "This animal consumes " << animal.getWaterConsumption() << " liters of water" << endl;
}

int main()
{
	FarmAnimal animalA(5);
	DummyAnimal animalB;
	DoublingAnimal animalC(21);
	cout << "Animal consumes " << animalA.getWaterConsumption() << " liters of water." << endl;
	cout << "What about the others ?" << endl;
	printConsumption(animalB);
	printConsumption(animalC);
	return 0;
}