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iOS Swift Enums and Structs Structs and their Methods Struct Methods

Why does 4/4 not work?

The web-page replies:

Bummer! Your code can not be complied...

When I go to the complier, it says

error on use of calculateTaxes

Why?

struct.swift
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))

    }

}
var item = Expense(description: "Business")
item.amount = 100.0

item = calculateTaxes(percentage: 7.5)

var taxes = item

2 Answers

Chris Shaw
Chris Shaw
26,662 Points

Hi Zach,

The code you've posted is attempting to reassigning the value for item to the Double returned by calculateTaxes method, instead you need to call and assign the value to taxes.

var item = Expense(description: "Business")
item.amount = 100.0
var taxes = item.calculateTaxes(7.5)

fixed an error thanks to Caleb's less tired eyes

Happy coding!

Caleb Kleveter
MOD
Caleb Kleveter
Treehouse Moderator 37,862 Points

Hi all,

Chris are you sure that line 3 has the right code? I tried that but to pass the challenge I had to use this code:

var taxes = item.calculateTaxes(7.5)
Chris Shaw
Chris Shaw
26,662 Points

Yep, that was my oversight, one of the many reasons you shouldn't write code at 11pm.