Animals.kt

abstract class Animal {
    var height: Double = 0.0
    var age: Int = 0
    var weight: Double = 0.0
    var isAlive: Boolean = false
    var isLongHair: Boolean? = null

    constructor() {
        this.isAlive = true
    }

    constructor(height: Double, weight: Double, age: Int) {
        this.height = height
        this.weight = weight
        this.age = age
    }

    open fun eat() {
        println("El animal está comiendo")
    }

    fun sleep() {
        println("El animal está durmiendo")
    }

    override fun toString(): String {
        return "Weight: $weight, Height: $height, Age: $age"
    }
}

enum class Breed {
    Pug,
    Dalmata,
    Terrier,
    Unknown
}

open class Dog : Animal {
    var breed: Breed

    constructor() {
        this.breed = Breed.Unknown
    }

    constructor(breed: Breed) {
        this.breed = breed
    }

    override fun eat() {
        println("El perro está comiendo")
    }
}

class Cat : Animal() {
    override fun eat() {
        println("El gato está comiendo")
    }
}


abstract class Geometry {
    abstract fun area()

    abstract fun perimeter()
}

class Circle : Geometry {
    var radio: Double

    constructor(radio: Double) {
        this.radio = radio
    }

    override fun area() {
        println("El area del circulo es = ${(radio * radio) * Math.PI}")
    }

    override fun perimeter() {
        println("El perimetro del circulo es = ${radio * (Math.PI * 2)}")
    }
}

class Triangle : Geometry() {
    override fun area() {
        TODO("Not yet implemented")
    }

    override fun perimeter() {
        TODO("Not yet implemented")
    }
}

fun main() {
    val dalmata = Dog(Breed.Dalmata)
    val pug = Dog(Breed.Pug)
    val dog = Dog()
    val terrier = Dog(Breed.Terrier)

    val circle = Circle(40.0)
    val circle2 = Circle(100.0)
    val circle3 = Circle(300.0)

    circle.area()
    val cat = Cat()
}