import java.lang.AbstractMethodError

fun main() {

    // create abstract class `JapanCar` that can only be inherited to Honda, Toyota, Daihatsu
    checkCar()

    // complete RacingCar
    var rc = RacingCar("hello",  3)
    val(name, maxSpeed) = rc
    println(name)

    // make this work
    var methodError = AbstractMethodError()
    methodError.displayMyName("Akbar")

    // should print "Turning motor on"
    TurboCar.turnOn()

    // assign variable on a fun and print it
    var h = Horse()
    h.giveName("Chituma")
    println(h.name) // should print chituma

    // create instance of SumbawaHorse
    var sumbawaHorse = Horse.SumbawaHorse("Black Caviar")
    sumbawaHorse.goRun()

    // create instance of AmericanHorse
    var americanHorse = Horse.AmericanHorse("Princsm")
    sumbawaHorse.goRun()

    // you can edit codes below, and make Interface Motor can be instantiated
    val motor: Motor
    motor.gas()

}

fun checkCar(expr: Car): String = when(expr) {
    is Honda -> "One heart!"
    is Toyota -> "Let's Go Beyond"
    Daihatsu -> "Innovation for Tomorrow"
}

class RacingCar

class TurboCar

class Horse

interface Motor {
    fun gas()
}