posted 22 years ago
Every few months someone asks this question, and the answer is usually another question. Which facets of what is lumped together in (say) C++ and called "multiple inheritance" do you actually need?
If you need "polymorphism", where a class is treated as if it is an object of some base class, use an interface - a class can implement as many interfaces as you like.
If you need to share the internal data from several classes, include instances of those classes as member variables and delegate any methods you need to the appropriate members.
Above all, first try and solve your problem without multiple inheritance. The great majority of problems have a solution using plain single inheritance, and where you do need something of it, you can use the sort of techniques I describe above.