OOP: CLASS, INHERITANCE

/* INHERITANCE
*  Create sub class from main class (Inheritance)
*  Create object from made class
* */

open class oop_vehicle {
    var name: String? = null
    var color: String? = null
    var wheels: Int? = null

    constructor()

    // Constructor
    constructor(name: String, color: String, wheels: Int) : this() {
        this.color = color
        this.name = name
        this.wheels = wheels

        println("Object, wheels: " + this.wheels + " name: " + this.name + " color: " + this.color)
    }
}

// Inheritance ( : )
class car() : oop_vehicle()

fun main() {
    // Create object
    var sedan = oop_vehicle("bmw", "red", 4)
    // Create object from class: car
    var cars = car()
    cars.wheels = 8
    println("Wheels: ${cars.wheels}")
}