写出下面程序的运行结果: open class Base() { var a = 1 private var b = 2 protected open val c = 3 internal val d = 4 protected fun e() { } } class Derived: Base() { override val c = 9 } fun main(args: Array
) { val base = Base() println("${base.d}") println("${base.a}") val derived = Derived() }