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iOS Swift Enums and Structs Structs and their Methods Struct Methods

Edwin Mhoy Silva Rifa
Edwin Mhoy Silva Rifa
2,631 Points
Posted by Edwin Mhoy Silva Rifa
Edwin Mhoy Silva Rifa
2,631 Points

Can´t assign item to an instance??

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
    var item = Expense
    init (description: "Kage er godt"), item: String, amount: 100 {
        self.description = description
    }

func calculateTaxes(percentage: Double) -> Double{
 return (self.amount * (percentage/100) )
}
}
var item = Expense
Renato Nobre
Renato Nobre
5,805 Points
Renato Nobre
Renato Nobre
5,805 Points

Hi Edwin, I identified the error in the code and what you need to do. So, first, you don't need to create the "var item = Expense" inside the struct, try wiping that line out. Next, looks like something is wrong with your init method, we don't need to specify a description there, neither the item and the amount, it should look like this: 

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

Now on your last line of code "var item = Expense" you need to put parentheses and now specify the description inside the parentheses, like this:

var item = Expense(description: "You should enter a description here")

And than to call the amount property you should use dot notation for your var item and assign it to 100:

    item.amount = 100

Hope you got it all, here is my full code in case you get lost:

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: "You should enter a description here")
 item.amount = 100

Obs: Task 4 not included, I don't want to spoil!

Fell free to contact me on my facebook page on twitter if you have any further questions, just check on my profile!

And I highly recommend you to read some swift Documentation on methods and enums: Swift Methods, Swift Enums

You are doing a nice Job, keep up! Good Luck