Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Zach Schapiro
1,060 PointsWhy 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 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
26,662 PointsHi 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
Treehouse Moderator 37,862 PointsHi 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
26,662 PointsYep, that was my oversight, one of the many reasons you shouldn't write code at 11pm.