Make sure that your public inherits form the "is-a" relationship -- C ++ Study Notes

Query the three inheritance types: protected, public, and private.

Good interface design prevents Invalid code compilation. Yes. If the compilation is successful, it indicates that the caller's behavior is correct. It is a very good design idea.

When designing public inheritance,

The idea of public inheritance and is that the things that can be applied to the base class can also be applied to the subclass. This is inconsistent with our conscious is-a. Be careful.

Remember:

Public inheritance means is-a, applicable to base class
And use derived
Class.