What is virtual class and friend class?
Friend classes are used when two or more classes are designed to work together and need access
to each other's implementation in ways that the rest of the world
shouldn't be allowed to have. In other words, they help keep private things private. For instance, it
may be desirable for class DatabaseCursor to have more privilege to the internals of class Database
than main() has.
Friend classes are used when two or more classes are designed to work together and need access
to each other's implementation in ways that the rest of the world
shouldn't be allowed to have. In other words, they help keep private things private. For instance, it
may be desirable for class DatabaseCursor to have more privilege to the internals of class Database
than main() has.
No comments:
Post a Comment