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iOS Object-Oriented Swift Value vs Reference Types Final Exam - Solution

Kenton Raiford
Kenton Raiford
5,101 Points
Posted by Kenton Raiford
Kenton Raiford
5,101 Points

getting error in convenience init "Use of unresolved identifier 'sideLength'

I am not sure why I keep getting this error. Anyone know what is wrong?

// Create a base class called Shape which will have 2 properties: sides and name

class Shape { let sides: Int let name: String

init(sides: Int, name: String) {
    self.sides = sides
    self.name = name
}

}

// Create a subclass called Square, it will also have 2 properties called: sideLength and area. // The area property will be a computed property with getter and setter methods.

class Square: Shape { var sideLength: Double var area: Double { get { return sideLength * sideLength } set { sideLength = sqrt(newValue) } }

// Add a designated initializer to Square which accept all three

init(name: String, sides: Int, sideLength: Double) {
    self.sideLength = sideLength
    super.init(sides: sides, name: name)
}
// Add a convenience initializer to Square that will accept only the sideLength and provide default values. 4 for sides and “Square” for name

convenience init (sideLength: Double) {
    self.init(name: "Square", sides: 4, sideLength:sidelength)
}

}

let square = Square(sideLength: 20) square.name square.sides square.sideLength square.area square.area = 100 square.sideLength

Kenton Raiford
Kenton Raiford
5,101 Points
Kenton Raiford
Kenton Raiford
5,101 Points

I figured out it was because I didn't capitalize 'sidelength' in the end.

convenience init (sideLength: Double) { self.init(name: "Square", sides: 4, sideLength: sidelength <----) }

when I corrected it, it worked.

convenience init (sideLength: Double) {
    self.init(name: "Square", sides: 4, sideLength:sideLength)
}

}