1. Object-oriented programming principles
A Lecture for the c++ Course
Each slide has its own narration in an audio file. For the explanation of any slide, click on the audio icon to start the narration.
The Professor‘s C++Course by Linda W. Friedman is licensed under a  Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

2. Oop principles
Inheritance, encapsulation, and polymorphism are the basic principles of object-oriented programming.
OOP Principles

3. Inheritance
Inheritance is the guiding principle for the relationship between classes. This is an explicit is-a relationship. Examples: Zebra is-a mammal Flower is-a plant Subclass  superclass The more specialized class inherits attributes and behaviors from the more generalized class.
OOP Principles

4. Encapsulation
 Encapsulation means that a class is cohesive and self-contained. The purpose of encapsulation is information hiding. If a class is designed well, its definition (implementation) can easily be hidden from other programmers who use the class in their programs; they only need to see the class interface in order to use the class.
OOP Principles

5. Polymorphism
 Polymorphism - poly (many) morph (form) - if two (or more) objects have the same interface (what the user of the class sees), but exhibit different behaviors, they are said to be polymorphic. Similar to function / operator overloading.
OOP Principles

6. What vs. how
Just like we learned when programming with functions, with classes we also distinguish between the interface and the implementation. Interface - the visible functionality of a class -- the "what" Implementation - the internal functionality and attributes of a class. A class's implementation is hidden from users of the class. -- the "how"
OOP Principles

7. Review
What did we learn in this lecture? Plenty. Some terms to jog your memory:
base class
polymorphism
class
class attributes
class implementation
class interface
encapsulation
information hiding
inheritance
object
OOP Principles