Kotlin Brain Teasers

Puzzle 8

What’s in the Box?

src/commonMain/kotlin/com/example/puzzles/types/variance/GenericArrays.kt

interface Fruit

class Strawberry() : Fruit
class Mangosteen() : Fruit
class Watermelon() : Fruit

fun main() {
  val strawberries = arrayOf(Strawberry(), Strawberry(), Strawberry())
  eatFruits(strawberries)
}

fun eatFruits(fruits: Array<Fruit>) {
  for (fruit in fruits) println("Ate a lovely ${fruit::class.simpleName}")
}

Guess the Output
	Try to guess the output (or error) before moving to the next page.

The program fails to compile, and the compiler displays the following error:

Argument type mismatch: