#include <iostream>
using namespace std;
 
class InterfaceA
{
	virtual void funA() = 0;
};
class InterfaceB:
	public InterfaceA
{
	virtual void funB() = 0;
};
class InterfaceC:
	public InterfaceA
{
};
class InterfaceD:
	public InterfaceB
{
};
 
class KlasseA:
	public InterfaceB,
	public InterfaceC,
	public InterfaceD
{
public:
	KlasseA();
	~KlasseA();
 
	void funA() final override;
};
 
//Implementierung:
KlasseA::KlasseA(){}
KlasseA::~KlasseA(){}
void KlasseA::funA(){}
 
 
class KlasseE: public KlasseA
{
public:
	KlasseE();
	~KlasseE();
 
	void funB() override;
};
//Implementierung:
KlasseE::KlasseE(){}
KlasseE::~KlasseE(){}
void KlasseE::funB(){}
 
 
int main() {
	KlasseE *e = new KlasseE();
 
	return 0;
}

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