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iOS Swift Enums and Structs Structs and their Methods Struct Methods

Carter Selman
Carter Selman
1,660 Points
Posted by Carter Selman
Carter Selman
1,660 Points

Im learning Structs, but I can't figure out how to apply them to this problem.

This is my code, can someone tell me what I did wrong please? When I set my variable amount to 100, it tells me I have an extra argument, and when I take it out, I get an error saying Recursive value type 'Expense' is not allowed.

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: "", amount: 100)

}

1 Answer

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

Hi Carter,

I think you just have a few brackets in the wrong place.

The var item bit happens outside of the struct. 

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

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

    // add the calculateTaxes method here
    // it should accept only one parameter named 'percentage' of type Double
    func calculateTaxes(percentage: Double) -> Double {
      return (self.amount * (percentage/100))
    }

} // struct closes here

var item = Expense(description: "Hotel")
item.amount = 100

Also, the initializer only takes one parameter - the description of type String.

That should sort it for you!

Steve.

Steve Hunter
Steve Hunter
57,712 Points

No problem! :-)