| fun box(): String { |
| val a1: Byte? = 1.plus(1) |
| val a2: Short? = 1.plus(1) |
| val a3: Int? = 1.plus(1) |
| val a4: Long? = 1.plus(1) |
| val a5: Double? = 1.0.plus(1) |
| val a6: Float? = 1f.plus(1) |
| val a7: Char? = 'A'.plus(1) |
| val a8: Int? = 'B'.minus('A') |
| |
| if (a1!! != 2.toByte()) return "fail 1" |
| if (a2!! != 2.toShort()) return "fail 2" |
| if (a3!! != 2) return "fail 3" |
| if (a4!! != 2L) return "fail 4" |
| if (a5!! != 2.0) return "fail 5" |
| if (a6!! != 2f) return "fail 6" |
| if (a7!! != 'B') return "fail 7" |
| if (a8!! != 1) return "fail 8" |
| |
| return "OK" |
| } |
