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Swift

}

class circle { var area = [radius]() var cprint: Int { return area.count }

subscript(i: Int) -> radius { get { return area[i] } set { area[i] = newValue } } func circleprint() { println("The number of rooms is \(cprint)") } var rectarea: circumference? }

class radius { let radiusname: String init(radiusname: String) { self.radiusname = radiusname } }

class circumference { var circumName: String? var circumNumber: String? var circumarea: String?

func buildingIdentifier() -> String? { if circumName != nil { return circumName 177

Swift is a powerful and instinctive programming language for macOS, iOS, watchOS and tvOS....  

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