Kotlin 진급 학습

try {

} catch (e: Exception) {

}

fun fact(num: BigInteger): BigInteger {
    if (num == BigInteger.ONE) {
        return BigInteger.ONE
    } else {
        return num * fact(num - BigInteger.ONE)
    }
}

tailrec

class Rect(var height: Int, var width: Int) {
    fun addC() {
    }
}
fun main(args: Array<String>) {
    var rect01 = Rect(20, 10)
    rect01.height
    rect01.width
    rect01.addC()
}

open class Father {
    var chactor : String = " "
    open fun action (){
        println(" ")
    }
}

class Son : Father(){
    override fun action(){
        println(" ")
    }
}

abstract class Human(var name: String) {
    abstract fun eat()
}

class Man(name: String) : Human(name) {
    override fun eat() {
    }
}

var person = Man("xiaoming")
person.eat()

interface Woman {
}

interface Human {
    fun baby()
}

class Woman : Human{
    override fun baby() {
    }
}

class Man: Human by Woman(){
    override fun baby() {
        Woman().baby()
    }
}

object Woman : Human{
    override fun baby() {
    }
}

enum class Week {
     ,  ,  ,  ,  ,  ,  
}
fun main(args: Array<String>) {
    Week. .ordinal// ， 
}

sealed class Son {
    fun sayHello(){
    }
    // 
    class xm() : Son()
    class xg() : Son()
}
fun main(args: Array<String>) {
    var s1 :Son = Son.xg()
    var s2 :Son = Son.xm()
    var list = listOf<Son>(s1,s2)
}