| fun equals1(a: Double, b: Double) = a == b |
| |
| fun equals2(a: Double?, b: Double?) = a!! == b!! |
| |
| fun equals3(a: Double?, b: Double?) = a != null && b != null && a == b |
| |
| fun equals4(a: Double?, b: Double?) = if (a is Double && b is Double) a == b else null!! |
| |
| fun equals5(a: Any?, b: Any?) = if (a is Double && b is Double) a == b else null!! |
| |
| |
| fun box(): String { |
| if (-0.0 != 0.0) return "fail 0" |
| if (!equals1(-0.0, 0.0)) return "fail 1" |
| if (!equals2(-0.0, 0.0)) return "fail 2" |
| if (!equals3(-0.0, 0.0)) return "fail 3" |
| if (!equals4(-0.0, 0.0)) return "fail 4" |
| if (!equals5(-0.0, 0.0)) return "fail 5" |
| |
| return "OK" |
| } |
| |
