Understanding Functions and Object-Oriented Programming: Modularity and Reusability Concepts

1. ICM class 4 Functions and Objects

2. Functions • Modularity

3. Functions • Modularity • Reusability

4. Functions

5. Functions ReturnType functionName (arguments){ } OutputType functionName (Input){ return output; }

6. Functions int square(int number){ return number * number; }

7. Functions Setup and draw… void

8. Objects – Part 1 • Encapsulation • Modularity

9. Encapsulation • An object is a bundle of variables, statements and functions

10. Encapsulation

11. Encapsulation class Car{ //declare properties Car(){ //init properties } //declare more methods }

12. Encapsulation Car car1; void setup(){ car1 = new Car(); } void draw(){ car1.doSomething(); }

13. Encapsulation • Lets try it together

14. Encapsulation Makes it easy to have more than 1

15. Encapsulation • Conceals the functional details

16. Modularity • Independent components

17. Objects – Part 2 • Inheritance • Overloading

18. Inheritance • Animals, cats and dogs… and elephants and giraffes, and goldfish!

19. Inheritance class Animal{ Animal(){} } class Cat extends Animal { Cat(){ super(); } }

20. Overloading • Same function name + different arguments • Ie. fill(255); • fill(255,123,0); • fill(255,123,0,115);

21. Why OOP • Easier updating • Easier debugging • Easier sharing • Reusable maintainable code

22. Why OOP • You don’t want to be like this guy