Swift - Error calling a function from another function [duplicate]

Question

While following Apple's book "The Swift Programming Language"

I ran across an issue while working on the "EXPERIMENT - Write a function that calculates the average of its arguments." from the first chapter.

To determine the average of a set of numbers, I want to reuse my sum of numbers [setOf(numbers: Int...)] function and divide by the count of numbers [numbers.count]. I am receiving the Error:

Could not find an overload for '__conversions' that accepts the supplied arguments

when I try to call sumOf(numbers) from my averageOf(numbers) function.

What should I change to call my sumOf(numbers) function correctly, from my averageOf(numbers) function?

func sumOf(numbers: Int...) -> Int {
    var sum = 0 //0
    for number in numbers {
        sum += number
    }
    return sum  //651
}
sumOf(42, 597, 12)  //651

func averageOf(numbers: Int...) -> Int {
    var sum = sumOf(numbers) //Issue in this line
    return  sum / numbers.count
}
averageOf(42, 597, 12)

Paste the code above into a new Xcode 6 playground to recreate.

Error Screenshot (I need 10 reputation points before I can post the image.)

Possible duplicate: stackoverflow.com/q/24024376/1639670

nathan
– nathan

2014-06-08 07:09:28 +00:00
Commented Jun 8, 2014 at 7:09 — nathan
– nathan, Commented Jun 8, 2014 at 7:09

Wolfgang Schreurs · Accepted Answer · 2014-06-08 07:31:14Z

0

You're passing a different type as the function expects. Apparently Int... is not the same as Int[].

You could create an override that accepts Int[] and returns the sum.

answered Jun 8, 2014 at 7:31

Wolfgang Schreurs

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