From 8cb0a1a8012342e152d0b9f756e684da6bca747a Mon Sep 17 00:00:00 2001
From: Richard Zak <richard@profian.com>
Date: Thu, 28 Jul 2022 12:58:58 -0400
Subject: [PATCH] fixup: Swift example takes arguments from CLI

Signed-off-by: Richard Zak <richard@profian.com>
---
 Swift/fibonacci/fibonacci.swift | 39 ++++++++++++++++++++++++---------
 1 file changed, 29 insertions(+), 10 deletions(-)

diff --git a/Swift/fibonacci/fibonacci.swift b/Swift/fibonacci/fibonacci.swift
index 7e36bd9a..d03d5a0e 100644
--- a/Swift/fibonacci/fibonacci.swift
+++ b/Swift/fibonacci/fibonacci.swift
@@ -1,12 +1,31 @@
-func fibonacci(n: Int) -> Int {
-var a = 0
-var b = 1
-for _ in 0..<n {
-let temp = a
-a = b
-b = temp + b
-}
-return a
+func fib(n: UInt) -> UInt {
+	if n <= 1 {
+		return n
+	}
+
+	return fib(n: n-1) + fib(n: n-2)
 }
 
-print(fibonacci(n:7))
+let arguments = CommandLine.arguments
+
+var n:UInt
+if (arguments.count > 1) {
+	for i in 1...arguments.count-1 {
+		if let n = UInt(arguments[i]) {
+			print("Fibonacci sequence number at index \(n) is \(fib(n: n))")
+		} else {
+			print("Failed to parse argument into a number: \(arguments[i])\n")
+		}
+	}
+} else {
+	print("Which Fibonacci index to find? ")
+	if let line = readLine() {
+		if let n = UInt(line) {
+			print("Fibonacci sequence number at index \(n) is \(fib(n: n))")
+		} else {
+			print("Could not convert \(line) to integer.\n")	
+		}
+	} else {
+		print("Could not read user input.\n")	
+	}
+}