Concepts of Inheritance
- Inheritance is one of the key feature of object-oriented programming.
- it allows user to create a new class(derived class) from a existing class(base class).
- The derived class inherits all feature from a base class and it can have additional features of its own.
Types of Inheritance:
C++, we have 5 different types of Inheritance. Namely,
- Single Inheritance
- Multiple Inheritance
- Hierarchical Inheritance
- Multilevel Inheritance
- Hybrid Inheritance (also known as Virtual Inheritance)
Access Control and Inheritance:
- A derived class can access all the non-private members of its base class.
- Thus base-class members that should not be accessible to the member functions of derived classes should be declared private in the base class.
- Following table shows different access types according to who can access them in the following way:
When deriving a class from a base class, the base class may be inherited through public, protected or private inheritance
- When deriving a class from a public base class,public members of the base class become public members of the derived class and protected members of the base class becomeprotected members of the derived class.
- A base class's privatemembers are never accessible directly from a derived class, but can be accessed through calls to the public and protected members of the base class.
- When deriving from a protected base class,public and protected members of the base class become protectedmembers of the derived class.
- When deriving from a private base class,public and protected members of the base class become privatemembers of the derived class.