ICM class 4

ICM class 4 Functions and Objects

Functions • Modularity

Functions • Modularity • Reusability

Functions

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

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

Functions Setup and draw… void

Objects – Part 1 • Encapsulation • Modularity

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

Encapsulation

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

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

Encapsulation • Lets try it together

Encapsulation Makes it easy to have more than 1

Encapsulation • Conceals the functional details

Modularity • Independent components

Objects – Part 2 • Inheritance • Overloading

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

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

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

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

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