SundayLabPractice.kt

fun MyClass.hello(){

}

fun main(args: Array<String>) {
    val myObj = MyClass("Ishaq",10,"34343434")
    myObj.phone

    myObj.hello()

    val a:Compulsury = B("",0)
}

open class MyClass(var name:String? = null,var age:Int = 0){

    var phone:String = ""

    constructor(name:String,age:Int,phone:String) : this(name,age){
        this.phone = phone
        println("MyClass hello")
    }

    init {
        println("hello")
    }

    fun helloABC(name:String){

    }
}

interface Compulsury{
    fun A()
    fun B()
}

interface Compulsury1{
    fun C()
    fun D()
}

class B(a:String,b:Int) : MyClass(a,b), Compulsury,Compulsury1{
    override fun C() {

    }

    override fun D() {

    }

    override fun A() {

    }

    override fun B() {

    }

}