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iOS Swift Enums and Structs Structs and their Methods Struct Methods

Posted by Michael McKinley
Michael McKinley
1,476 Points

What is wrong with this code?

It can't compile the last line and I don't understand why

here is the prompt:

"Create a variable named item and assign it an instance of Expense (remember to use the initializer with the description parameter. Enter any description you like). On the next line assign the amount property a value of 100."

struct.swift 
struct Expense {
    var description: String
    var amount: Double = 0.0

    init (description: String) {
        self.description = description
    }

    func calculateTaxes(percentage: Double) -> Double {
        return (self.amount * (percentage/100))
    }
var item = Expense(description: "Rent")
item.amount = 100.00
}
Sander de Vries
Sander de Vries
4,693 Points
Sander de Vries
Sander de Vries
4,693 Points

I believe you should declare your variable item outside of your struct.

1 Answer

Sinoheh Enayati
Sinoheh Enayati
4,528 Points
Sinoheh Enayati
Sinoheh Enayati
4,528 Points 
struct Expense {
    var description: String
    var amount: Double = 0.0

    init (description: String) {
        self.description = description
    }

    func calculateTaxes(percentage: Double) -> Double {
        return (self.amount * (percentage/100))
    }
}
var item = Expense(description: "Rent")
item.amount = 100.00
Stephen Hancocks
Stephen Hancocks
9,271 Points
Stephen Hancocks
Stephen Hancocks
9,271 Points

Thanks for this. A simple mistake to make and I couldn't see my issue in my rush to complete the challenge and get on with the course.