C / C++ / MFC

public class C3DCamera : public ICamera, public IOrientation
{

  //ICamera implementation
  ICamera *ICamera::CreateClone() const;

  //IOrientation implementation
  IOrientation *IOriendtation::CreateClone() const;

  //...
  //rest of C3DCamera's declaration
}

class IClonable
{
public:
  virtual ~IClonable()
  {}

  virtual IClonable *CreateClone() = 0;
};

class ICamera : public ICloneable
{
   //...
};

class IOrientation : public ICloneable
{
   //...
};

class C3DCamera : public ICamera, public IOrientation
{
public:
   //...
   ICloneable *CreateClone();
}

class ICamera {
public:  
	virtual  bool  CreateClone( ICamera* &C ) const = 0;
	virtual  bool  f() = 0;
};

class IOrientation { 
public:  
	virtual  bool  CreateClone( IOrientation* &O ) const = 0;
	virtual  bool  f() = 0;
};

class C2DCamera : public ICamera, public IOrientation {
public:  
	virtual  bool  CreateClone( ICamera*      &C ) const  { C = new C2DCamera;  return(true); }
	virtual  bool  CreateClone( IOrientation* &O ) const  { O = new C2DCamera;  return(true); }
	virtual  bool  f()  { return(true); }
};

class C3DCamera : public ICamera, public IOrientation {
public:  
	virtual  bool  CreateClone( ICamera*      &C ) const  { C = new C3DCamera;  return(true); }
	virtual  bool  CreateClone( IOrientation* &O ) const  { O = new C3DCamera;  return(true); }
	virtual  bool  f()  { return(true); }
};

int main(int argc, char* argv[])
{
	C2DCamera      d2;
	C3DCamera      d3;
	ICamera       *i2 = &d2,
	              *i3 = &d3;
	ICamera       *c2 = NULL,
	              *c3 = NULL;

	i2->CreateClone(c2);
	c2->f();

	i3->CreateClone(c3);
	c3->f();

	return 0;
}<pre>
 

...cmk

<small>Save the whales - collect the whole set</small>

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow