Learn more about Inheritance - Syntax and examples.
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C and Cpp Inheritance Syntax and Examples
Before beginning this lesson, you should have an understanding of the idea of inheritance. If you do not, please read lesson 19 . This lesson will consist of an overview of the syntax of inheritance, the use of the keywords public, private, and protected, and then an example program following to demonstrate each.
The syntax to denote one class as inheriting from another is simple. It looks like the following: class Bear : public Animal, in place of simply the keyword class and then the class name. The ": public base_class_name " is the essential syntax of inheritance; the function of this syntax is that the class will contain all public and protected variables of the base class. Do not confuse the idea of a derived class having access to data members of a base class and specific instances of the derived class possessing data.
The data members - variables and functions - possessed by the derived class are specific to the type of class, not to each individual object of that type. So, two different Bear objects, while having the same member variables and functions, may have different information stored in their variables; furthermore, if there is a class Animal with an object, say object BigAnimal, of that type, and not of a more specific type inherited from that class, those two bears will not have access to the data within BigAnimal.
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