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 propertiesCar(){

//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