C++ allows you to inherit from more than one base class. This is a powerful facility when used with interfaces, as we will discover later in this chapter. It can be useful for implementation inheritance, but it can cause some problems. The syntax is simple: you provide a list of classes to inherit from:
class base1 { public: void a(); }; class base2 { public: void b(); }; class derived : public base1, public base2 { public: // gets a and b };
One way to use multiple inheritances is to build up libraries of classes each providing some functionality, or services. To get these services in your class you can add the class from the library to your base class list. Such a building block approach to creating classes ...
