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INTRODUCTION TO OOP
Objective:
•Know the difference between functional programming
and OOP
• Know basic terminology in OOP
• Know the importance of OOP
• Know four design principles of OOP
• Know OOP programming languages
Prepare for your exams
Study with the several resources on Docsity
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Guidelines and tips
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Intro to OOP about features, Slides of Computer Science
Why use OPP? Building blocks of OOP? Classes Objects What is OOP? OOP concepts? Abstraction Encapsulation Inheritance Polymorphism Advantages vs Disadvantages Conclusion
Typology: Slides
2023/2024
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INTRODUCTION TO OOP
Objective:
Know the difference between functional programm
and OOP
Know basic terminology in OOP
Know the importance of OOP
Know four design principles of OOP
Know OOP programming languages
STRUCTURED vs. OO PROGRAMMING
STRUCTURED PROGRAMMING:
MAIN PROGRAM
FUNCTION 2 FUNCTION 3
GLOBAL DATA
FUNCTION 4 FUNCTION 5
FUNCTION
1
OBJECT ORIENTED PROGRAMMING
Object 1
Object 2
Data
Function
Data
Function
Object 3
Data
Function
OBJECT ORIENTED PROGRAMMING
- Objects have both data and methods
- Objects of the same class have the same data
elements and methods
- Objects send and receive messages to invoke
actions
Key idea in object-oriented:
The real world can be accurately described as a collection of
objects that interact.
Example for attributes and methods
Attributes:
manufacturer’s
name
model name
year made
color
number of doors
size of engine
etc.
Methods:
Define data items
(specify
manufacturer’s name,
model, year, etc.)
Change a data item
(color, engine, etc.)
Display data items
Calculate cost
etc.
Why OOP?
- Save development time (and cost) by
reusing code
once an object class is created it can be
used in other applications
- Easier debugging -
classes can be tested independently
- reused objects have already been tested
Encapsulation
- Also known as data hiding
- Only object’s methods can modify
information in the object_._
Analogy:
- ATM machine can only update accounts of
one person or object only.
Abstraction
Focus only on the important facts about the
problem at hand
to design, produce, and describe so that it can
be easily used without knowing the details of
how it works.
Analogy:
When you drive a car, you don’t have to know
how the gasoline and air are mixed and ignited.
Instead you only have to know how to use the
controls.
Draw map
Function Overloading
The operation of one function depends on
the argument passed to it.
Example: Fly(), Fly(low), Fly(150)
Inheritance
- Inheritance —a way of organizing classes
- Term comes from inheritance of traits like
eye color, hair color, and so on.
- Classes with properties in common can be
grouped so that their common properties are
only defined once.
- Superclass – inherit its attributes &
methods to the subclass(es).
- Subclass – can inherit all its superclass
attributes & methods besides having its own
unique attributes & methods.
Object-Oriented Programming Languages