gistfile1.txt

class Rectangle{
    let height: Double
    let width: Double
    
    init(height: Double, width: Double) {
        self.height = height
        self.width = width
    }
    
    func calculateArea() -> Double{
        return width * height
    }
}

class MeasureArea {
    func area(obj: Rectangle) -> Double{
        return obj.calculateArea()
    }
}

let measureAreaObj = MeasureArea()
let rectObj = Rectangle(height: 5.0, width: 7.0)
print("Area of rectangle is: \(measureAreaObj.area(obj: rectObj))")