How can I simulate interfaces in C++?

Question

Since C++ lacks the interface feature of Java and C#, what is the preferred way to simulate interfaces in C++ classes? My guess would be multiple inheritance o

Answer 1

By the way MSVC 2008 has __interface keyword.

A Visual C++ interface can be defined as follows: 

 - Can inherit from zero or more base
   interfaces.
 - Cannot inherit from a base class.
 - Can only contain public, pure virtual
   methods.
 - Cannot contain constructors,
   destructors, or operators.
 - Cannot contain static methods.
 - Cannot contain data members;
   properties are allowed.

This feature is Microsoft Specific. Caution: __interface has no virtual destructor that is required if you delete objects by its interface pointers.