using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; // Simply spells out the integer the user enters. Ex. (user enter 501, output five hundred one) // Enter an integer between 0 and 10^30 that is nonillion in case you were wordering. // Please test and leave comments namespace MyVersionOfNumberConverter { class Program { static void Main(string[] args) { Console.WriteLine("Enter a number between 0 and 10^30"); string number = Console.ReadLine(); var numeralSpelling = new NumeralSpelling(number); Console.WriteLine(numeralSpelling.ToString()); } } public class NumeralSpelling { private StringBuilder stringBuilder = new StringBuilder(); public string UserInput { get; private set; } private Dictionary largeNumberFormatDictionary = new Dictionary(); private Dictionary largeNumbers = new Dictionary { {1,"" }, {2," thousand"},{3," million" }, {4," billion"}, {5," trillion" }, {6, " quadrillion"}, {7," quintillion"}, { 8," Sextillion" }, {9," Septillion" }, {10," Octillion" }, {11," Nonillion" } //https://www.google.com/search?q=nonillion }; private Dictionary onesDictionary = new Dictionary() { { 0,"" },{ 1," one" },{ 2," two" },{ 3," three" }, { 4," four" },{ 5," five" },{ 6," six" }, { 7," seven" },{ 8," eight" },{ 9," nine" } }; private Dictionary teensDictionary = new Dictionary() { { 10," ten" },{ 11," eleven" },{ 12," twelve" }, { 13," thirteen" },{ 14," fourteen"},{ 15," fifteen" }, { 16," sixteen" },{ 17," seventeen" },{ 18," eighteen" }, { 19," nineteen" } }; private Dictionary tensDictionary = new Dictionary() { { 2," twenty" },{ 3," thirty" },{ 4," forty" },{ 5," fifty" }, { 6," sixty" }, { 7," seventy"},{ 8," eighty" },{ 9," ninety" } }; public NumeralSpelling(string userInput) { UserInput = userInput; CorrectEntryFormat(); IsZero(); IsTooLarge(); AddPadding(); SetUpLargeNumberFormatDictionary(); GetNameOfNumber(); } private void IsZero() { if(UserInput.All(item => item == '0')) { UserInput = "000"; } } private void IsTooLarge() { if (UserInput.Length > 31) { Console.WriteLine("Number entered has more than 30 digits."); Environment.Exit(1); } } // Method cleanse the user entry of unwanted characters private void CorrectEntryFormat() { string qc = "0123456789"; int lengthBeforeCleanUp = UserInput.Length; var test = UserInput.SelectMany(item => qc.Contains(item)?item.ToString():""); UserInput = ""; Array.ForEach(test.ToArray(), item => UserInput += item); if (lengthBeforeCleanUp != UserInput.Length) { Console.WriteLine( "The cleaned up integer is- {0} " ,UserInput.Length == 0 ? "empty": UserInput ); } } // This method adds zeros to the user input to ensure the // LargeNumberFormatDictionary is divisble by 3 private void AddPadding() { int remainder = UserInput.Length % 3; UserInput = remainder == 2 ? UserInput.Insert(0, "0") : remainder == 1 ? UserInput.Insert(0, "00") : UserInput; } // Breaksdown the user input into smallers strings with a // length of 3 and is assigned a key(large number name) depending where falls // with the user input number. private void SetUpLargeNumberFormatDictionary() { int index; for (int i = 0; i < UserInput.Length/3; i++) { index = UserInput.Length / 3 - i; largeNumberFormatDictionary.Add(largeNumbers[index], UserInput.Substring(i * 3, 3)); } } // Get the name of each digit with in the largeNumberFormatDictionary // then appends them to the StringBuilder private void GetNameOfNumber() { foreach (var item in largeNumberFormatDictionary) { string index = item.Value.Substring(0,1); stringBuilder.Append( index == "0" ? "" : onesDictionary[int.Parse(index)]+" hundred"); index = item.Value.Substring(1,1); stringBuilder.Append(index != "0" && index != "1" ? tensDictionary[int.Parse(index)] : ""); string index2 = item.Value.Substring(1, 2); stringBuilder.Append(index.Equals("1") ? teensDictionary[int.Parse(index2)] : ""); int num = int.Parse(index2); index = item.Value.Substring(2,1); stringBuilder.Append( num > 9 && num < 20 ? "" : onesDictionary[int.Parse(index)]); stringBuilder.Append(item.Value.Equals("000") ? "" : item.Key); } stringBuilder.Append(stringBuilder.Length != 0 ? "" : "zero"); } public override string ToString() { return stringBuilder.ToString(); } } }

[Challenges] Integers to Text Translator