//MANUEL, DANIELLA MAE L.

//CCP 1103 - ITBC

//NUMBER TO WORD

​

using System;

public class Program

{

    public static void Main()

    {

        string input;

            string variables;

            string onesNumber = "";

            string tensNumber = "";

            string hundredsNumber = "";

            string thousandsNumber = "";

            int number;

​

            Console.WriteLine("Number to Words\n");

            Console.Write("Enter number: ");

            input = Console.ReadLine();

​

            if (Int32.TryParse(input, out number) == true)

            {

                int ones = number % 10;

                int tens = number / 10;

                int hundreds = number / 100;

                int thousands = number / 1000;

​

                if ((number < 1) || (number > 1000))

                {

                    Console.WriteLine("Invalid input. Enter number between 1 to 1000 only.");

                }

                else

                {

                    switch (ones)

                    {

                        case 1:

                            onesNumber = "One";

                            break;

                        case 2:

                            onesNumber = "Two";

                            break;

                        case 3:

                            onesNumber = "Three";

                            break;

                        case 4:

                            onesNumber = "Four";

                            break;

                        case 5:

                            onesNumber = "Five";

                            break;

                        case 6:

                            onesNumber = "Six";

                            break;

                        case 7:

                            onesNumber = "Seven";

                            break;

                        case 8:

                            onesNumber = "Eight";

                            break;

                        case 9:

                            onesNumber = "Nine";

                            break;

                    }

​

                    switch (tens)

                    {

                        case 1:

                            if (ones == 1)

                            {

                                tensNumber = "Eleven";

                                onesNumber = "";

                            }

                            else if (ones == 2)

                            {

                                tensNumber = "Twelve";

                                onesNumber = "";

                            }

                            else if (ones == 3)

                            {

                                tensNumber = "Thirteen";

                                onesNumber = "";

                            }

                            else if (ones == 4)

                            {

                                tensNumber = "Fourteen";

                                onesNumber = "";

                            }

                            else if (ones == 5)

                            {

                                tensNumber = "Fifteen";

                                onesNumber = "";

                            }

                            else if (ones == 6)

                            {

                                tensNumber = "Sixteen";

                                onesNumber = "";

                            }

                            else if (ones == 7)

                            {

                                tensNumber = "Seventeen";

                                onesNumber = "";

                            }

                            else if (ones == 8)

                            {

                                tensNumber = "Eighteen";

                                onesNumber = "";

                            }

                            else if (ones == 9)

                            {

                                tensNumber = "Nineteen";

                                onesNumber = "";

                            }

                            else

                            {

                                tensNumber = "Ten";

                            }

                            break;

                        case 2:

                            tensNumber = "Twenty";

                            break;

                        case 3:

                            tensNumber = "Thirty";

                            break;

                        case 4:

                            tensNumber = "Forty";

                            break;

                        case 5:

                            tensNumber = "Fifty";

                            break;

                        case 6:

                            tensNumber = "Sixty";

                            break;

                        case 7:

                            tensNumber = "Seventy";

                            break;

                        case 8:

                            tensNumber = "Eighty";

                            break;

                        case 9:

                            tensNumber = "Ninety";

                            break;

                    }

​

                                        switch (tens)

                    {

                        case 11: case 21: case 31: case 41: case 51: case 61: case 71: case 81: case 91:

                            if (ones == 1)

                            {

                                tensNumber = "Eleven";

                                onesNumber = "";

                            }

                            else if (ones == 2)

                            {

                                tensNumber = "Twelve";

                                onesNumber = "";

                            }

                            else if (ones == 3)

                            {

                                tensNumber = "Thirteen";

                                onesNumber = "";

                            }

                            else if (ones == 4)

                            {

                                tensNumber = "Fourteen";

                                onesNumber = "";

                            }

                            else if (ones == 5)

                            {

                                tensNumber = "Fifteen";

                                onesNumber = "";

                            }

                            else if (ones == 6)

                            {

                                tensNumber = "Sixteen";

                                onesNumber = "";

                            }

                            else if (ones == 7)

                            {

                                tensNumber = "Seventeen";

                                onesNumber = "";

                            }

                            else if (ones == 8)

                            {

                                tensNumber = "Eighteen";

                                onesNumber = "";

                            }

                            else if (ones == 9)

                            {

                                tensNumber = "Nineteen";

                                onesNumber = "";

                            }

                            else

                            {

                                tensNumber = "Ten";

                            }

                            break;

                        case 12: case 22: case 32: case 42: case 52: case 62: case 72: case 82: case 92:

                            tensNumber = "Twenty";

                            break;

                        case 13: case 23: case 33: case 43: case 53: case 63: case 73: case 83: case 93:

                            tensNumber = "Thirty";

                            break;

                        case 14: case 24: case 34: case 44: case 54: case 64: case 74: case 84: case 94:

                            tensNumber = "Forty";

                            break;

                        case 15: case 25: case 35: case 45: case 55: case 65: case 75: case 85: case 95:

                            tensNumber = "Fifty";

                            break;

                        case 16: case 26: case 36: case 46: case 56: case 66: case 76: case 86: case 96:

                            tensNumber = "Sixty";

                            break;

                        case 17: case 27: case 37: case 47: case 57: case 67: case 77: case 87: case 97:

                            tensNumber = "Seventy";

                            break;

                        case 18: case 28: case 38: case 48: case 58: case 68: case 78: case 88: case 98:

                            tensNumber = "Eighty";

                            break;

                        case 19: case 29: case 39: case 49: case 59: case 69: case 79: case 89: case 99:

                            tensNumber = "Ninety";

                            break;

                    }

​

                    switch (hundreds)

                    {

                        case 1:

                            hundredsNumber = "One Hundred";

                            break;

                        case 2:

                            hundredsNumber = "Two Hundred";

                            break;

                        case 3:

                            hundredsNumber = "Three Hundred";

                            break;

                        case 4:

                            hundredsNumber = "Four Hundred";

                            break;

                        case 5:

                            hundredsNumber = "Five Hundred";

                            break;

                        case 6:

                            hundredsNumber = "Six Hundred";

                            break;

                        case 7:

                            hundredsNumber = "Seven Hundred";

                            break;

                        case 8:

                            hundredsNumber = "Eight Hundred";

                            break;

                        case 9:

                            hundredsNumber = "Nine Hundred";

                            break;

                    }

​

                    switch (thousands)

                    {

                        case 1:

                            thousandsNumber = "One Thousand";

                            break;

                    }

                }

​

                if (number >= 1 && number <= 9)

                {

                    variables = onesNumber;

                }

                else if (number >= 10 && number <= 99)

                {

                    variables = tensNumber + " " + onesNumber;

                }

                else if (number >= 100 && number <= 999)

                {

                    variables = hundredsNumber + " " + tensNumber + " " + onesNumber;

                }

                else

                {

                    variables = thousandsNumber;

                }

                Console.WriteLine(variables);

            }

            else

            {

                Console.WriteLine("Invalid input. Enter number between 1 to 1000 only.");

            }

    }

}