Access Rights

Scope of access rights

The access rights of the inheritance determine which functionalities of the base class can be used in the derived class.

• A class can be derived public, protected, or private from its base class.
• For classes, the default access right is private; for structs, it’s public.

class BankAcc: Acc{...} is the same as class BankAcc: private Acc{...}

Is-a relations

The derived class and the base class have an is-a relationship. Public inheritance is called an is-a relationship because the derived class has the same interface as the base class. The derived class is a specialization of the base class.

public

class BankAccount: public Account{ ...

public and protected members in the Account class are public and protected in the BankAccount class.

protected

 class BankAccount: protected Account{ ...

public and protected members in the Account class are protected in the BankAccount class.

private

 class BankAccount: private Account{ ...

public and protected members in the Account class are private in the BankAccount.

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In the next lesson, we’ll look at the examples of inheritance.