2. Design strategies

2.1 Private domains

Members of a class belonging to a private domain can only be accessed by a member function of the same class or by functions outside the class, but specified friend by the class owner. This means that functions belonging to classes defined by inheritance will not have access to these private members.

When designing a class, we always have to think about the evolutions that might be necessary later on. Can we think of them all? How can we reconcile taking these evolutions into account, in general, through inheritance and the reprogramming of certain processes, with the fact that...