http://cur.lv/4x9e0 (Earn Bitcoins)

/* * Write a program that converts a number in the range [0...999] to a text corresponding to its English pronunciation. Examples:
	0 -> "Zero"
	273 -> "Two hundred seventy three"
	400 -> "Four hundred"
	501 -> "Five hundred and one"
	711 -> "Seven hundred and eleven"
*/
using System;

class NumberToText
{
    static void Main(string[] args)
    {
        Console.Write("Enter a number between [1..999]: ");
        int number = int.Parse(Console.ReadLine());
        string textNumber = "";

        int digits = number % 10;
        int tens = number % 100;
        int hundreds = number / 100;

        if (hundreds != 0)
        {
            switch (hundreds)
            {
                case 1: textNumber += "One hundred "; break;
                case 2: textNumber += "Two hundred "; break;
                case 3: textNumber += "Three hundred "; break;
                case 4: textNumber += "Four hundred "; break;
                case 5: textNumber += "Five hundred "; break;
                case 6: textNumber += "Six hundred "; break;
                case 7: textNumber += "Seven hundred "; break;
                case 8: textNumber += "Eight hundred "; break;
                case 9: textNumber += "Nine hundred "; break;
            }
            if (tens / 10 == 0 && digits != 0)
            {
                textNumber += "and ";
                switch (digits)
                {
                    case 0: textNumber += "zero"; break;
                    case 1: textNumber += "one"; break;
                    case 2: textNumber += "two"; break;
                    case 3: textNumber += "three"; break;
                    case 4: textNumber += "four"; break;
                    case 5: textNumber += "five"; break;
                    case 6: textNumber += "six"; break;
                    case 7: textNumber += "seven"; break;
                    case 8: textNumber += "eight"; break;
                    case 9: textNumber += "nine"; break;
                }
            }
        }
        if (tens < 20)
        {
            switch (tens)
            {
                case 10: textNumber += "ten"; break;
                case 11: textNumber += "eleven"; break;
                case 12: textNumber += "twelve"; break;
                case 13: textNumber += "thirteen"; break;
                case 14: textNumber += "fourteen"; break;
                case 15: textNumber += "fifteen"; break;
                case 16: textNumber += "sixteen"; break;
                case 17: textNumber += "seventeen"; break;
                case 18: textNumber += "eighteen"; break;
                case 19: textNumber += "nineteen"; break;
            }
        }
        else
        {
            switch (tens / 10)
            {
                case 2: textNumber += "twenty "; break;
                case 3: textNumber += "thirty "; break;
                case 4: textNumber += "fourty "; break;
                case 5: textNumber += "fifty "; break;
                case 6: textNumber += "sixty "; break;
                case 7: textNumber += "seventy "; break;
                case 8: textNumber += "eigthy "; break;
                case 9: textNumber += "ninety "; break;
            }
            if (digits != 0)
            {
                switch (digits)
                {
                    case 0: textNumber += "zero"; break;
                    case 1: textNumber += "one"; break;
                    case 2: textNumber += "two"; break;
                    case 3: textNumber += "three"; break;
                    case 4: textNumber += "four"; break;
                    case 5: textNumber += "five"; break;
                    case 6: textNumber += "six"; break;
                    case 7: textNumber += "seven"; break;
                    case 8: textNumber += "eight"; break;
                    case 9: textNumber += "nine"; break;
                }
            }
        }
        if (hundreds == 0 && tens/10 == 0)
        {
            switch (digits)
            {
                case 0: textNumber += "zero"; break;
                case 1: textNumber += "one"; break;
                case 2: textNumber += "two"; break;
                case 3: textNumber += "three"; break;
                case 4: textNumber += "four"; break;
                case 5: textNumber += "five"; break;
                case 6: textNumber += "six"; break;
                case 7: textNumber += "seven"; break;
                case 8: textNumber += "eight"; break;
                case 9: textNumber += "nine"; break;
            }
        }       

        Console.WriteLine("{0} -> {1}", number, textNumber);
    }
}