- Added my first Swift solution.

1 files changed, 112 insertions, 0 deletions

diff --git a/challenge-065/mohammad-anwar/swift/ch-1.swift b/challenge-065/mohammad-anwar/swift/ch-1.swift
new file mode 100644
index 0000000000..c353776ff9
--- /dev/null
+++ b/challenge-065/mohammad-anwar/swift/ch-1.swift
@@ -0,0 +1,112 @@
+import Foundation
+
+/*
+Perl Weekly Challenge - 065
+
+Task #1: Digits Sum
+
+https://perlweeklychallenge.org/blog/perl-weekly-challenge-065/
+*/
+
+do {
+    let paramCount:Int = Int(CommandLine.argc)
+
+    if paramCount <= 1 {
+        throw ParamError.missingDigitsAndSum
+    }
+    else if paramCount <= 2 {
+        throw ParamError.missingSum
+    }
+
+    let digits:String = String(CommandLine.arguments[1])
+    let sum:String    = String(CommandLine.arguments[2])
+
+    let start:Int = try startIndex(d: digits)
+    let stop:Int  = try stopIndex(d: digits)
+
+    print(digitsSum(start, stop, sum))
+}
+catch ParamError.missingDigitsAndSum {
+    print("Missing Digits and Sum")
+}
+catch ParamError.missingDigits {
+    print("Missing Digits")
+}
+catch ParamError.missingSum {
+    print("Missing Sum")
+}
+catch let error {
+    print(error)
+}
+
+//
+//
+// Functions
+
+enum ParamError: Error {
+    case missingDigitsAndSum
+    case missingDigits
+    case missingSum
+}
+
+func digitsSum(_ start:Int, _ stop:Int, _ sum:String) -> String {
+
+    var s:String = ""
+    for i in start...stop {
+        let _sum:String = sumDigits(n: String(i))
+        if sum == _sum {
+            if s == "" {
+                s = String(i)
+            }
+            else {
+                s = s + ", " + String(i)
+            }
+        }
+    }
+
+    return s
+}
+
+func startIndex(d digits:String) throws -> Int {
+
+    guard let count:Int = Int(digits) else {
+        throw ParamError.missingDigits
+    }
+
+    var index:String = "1"
+    for _ in 1..<count {
+        index = index + "0"
+    }
+
+    guard let s:Int = Int(index) else { return Int() }
+    return s
+}
+
+func stopIndex(d digits:String) throws -> Int {
+
+    guard let count:Int = Int(digits) else {
+        throw ParamError.missingDigits
+    }
+
+    var index:String = ""
+    for _ in 1...count {
+        index = index + "9"
+    }
+
+    guard let s:Int = Int(index) else { return Int() }
+    return s
+}
+
+func sumDigits(n number:String) -> String {
+
+    let digits  = Array(number)
+    var sum:Int = 0
+
+    for i in digits {
+        if let i:Int = Int(String(i)) {
+            sum = sum + i
+        }
+    }
+
+    return String(sum)
+}