gistfile1.kt

open class A(open val bar: Int = 5) {
    {
        println("A: " + bar)
    }
}

class B(override val bar: Int = 2) : A() {
    {
        println("B: " + bar)
    }
}

class C : A() {
    {
        println("C: " + bar)
    }
}

fun main(args: Array<String>) {
    B()
    C()
}