Mega Code Archive
Resolving Ambiguity in Case of Multiple Inheritance Involving Common Base Classes
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#include <iostream>
using namespace std;
typedef int HANDS;
enum COLOR { Red, Green, Blue, Yellow, White, Black, Brown } ;
class Animal
{
public:
Animal(int);
virtual ~Animal() { cout << "Animal destructor...\n"; }
virtual int GetAge() const { return itsAge; }
virtual void SetAge(int age) { itsAge = age; }
private:
int itsAge;
};
Animal::Animal(int age):
itsAge(age)
{
cout << "Animal constructor...\n";
}
class Horse : public Animal
{
public:
Horse(COLOR color, HANDS height, int age);
virtual ~Horse() { cout << "Horse destructor...\n"; }
virtual void Whinny()const { cout << "Whinny!... "; }
virtual HANDS GetHeight() const { return itsHeight; }
virtual COLOR GetColor() const { return itsColor; }
protected:
HANDS itsHeight;
COLOR itsColor;
};
Horse::Horse(COLOR color, HANDS height, int age):
Animal(age),
itsColor(color),itsHeight(height)
{
cout << "Horse constructor...\n";
}
class Bird : public Animal
{
public:
Bird(COLOR color, bool migrates, int age);
virtual ~Bird() {cout << "Bird destructor...\n"; }
virtual void Chirp()const { cout << "Chirp... "; }
virtual void Fly()const{ cout << "fly! "; }
virtual COLOR GetColor()const { return itsColor; }
virtual bool GetMigration() const { return itsMigration; }
protected:
COLOR itsColor;
bool itsMigration;
};
Bird::Bird(COLOR color, bool migrates, int age):
Animal(age),
itsColor(color), itsMigration(migrates)
{
cout << "Bird constructor...\n";
}
class Pegasus : public Horse, public Bird
{
public:
void Chirp()const { Whinny(); }
Pegasus(COLOR, HANDS, bool, long, int);
virtual ~Pegasus() {cout << "Pegasus destructor...\n";}
virtual long GetNumberBelievers() const
{ return itsNumberBelievers; }
virtual COLOR GetColor()const { return Horse::itsColor; }
virtual int GetAge() const { return Horse::GetAge(); }
private:
long itsNumberBelievers;
};
Pegasus::Pegasus(
COLOR aColor,
HANDS height,
bool migrates,
long NumBelieve,
int age):
Horse(aColor, height,age),
Bird(aColor, migrates,age),
itsNumberBelievers(NumBelieve)
{
cout << "Pegasus constructor...\n";
}
int main()
{
Pegasus *pPeg = new Pegasus(Red, 5, true, 10, 2);
int age = pPeg->GetAge();
cout << "This pegasus is " << age << " years old.\n";
delete pPeg;
return 0;
}
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