Converting integers to roman numerals

Question

I\'m trying to write a function that converts numbers to roman numerals. This is my code so far; however, it only works with numbers that are less than 400. Is there a quick

Answer 1

The solution is lengthy, but easy to understand for a beginner. Process up to 3000

namespace RomansTranslator
{
    using System;
    using System.Collections.Generic;
    /// 

    /// Accepts a number (between 1 and 3000) and prints its Roman equivalent.
    /// 
    class Program
    {
        static void Main(string[] args)
        {
            string number = string.Empty;
            Console.Write("Enter the Numeric number : ");
            number = Console.ReadLine();
            if (IsValid(number)) // Validates the input
            {
                string roman = ConvertToRoman(number);
                Console.WriteLine("Roman Number is " + roman);
            }
            else
            {
                Console.WriteLine("Invalid Number");
            }
            Console.ReadKey();
        }

        private static string ConvertToRoman(string numberString)
        {
            string romanValue = string.Empty;
            int number = Convert.ToInt32(numberString);
            if (number >= 1)
            {
                // Loop through each roman character from highest 
                foreach (int item in RomanDictionary().Keys)
                {
                    while (number >= item)
                    {
                        romanValue = romanValue + RomanString(item);
                        number -= item;
                    }
                }
            }
            return romanValue;
        }

        /// 

        /// Returns Roman Equvalent
        /// 
        /// 
        /// 
        private static string RomanString(int n)
        {
            string romanString = string.Empty;
            romanString = RomanDictionary()[n].ToString();
            return romanString;
        }

        /// 

        /// List of Roman Characters 
        /// 
        /// 
        private static Dictionary RomanDictionary()
        {

            Dictionary romanDic = new Dictionary();
            romanDic.Add(1000, "M");
            romanDic.Add(900, "CM");
            romanDic.Add(500, "D");
            romanDic.Add(400, "CD");
            romanDic.Add(100, "C");
            romanDic.Add(90, "XC");
            romanDic.Add(50, "L");
            romanDic.Add(40, "XL");
            romanDic.Add(10, "X");
            romanDic.Add(9, "IX");
            romanDic.Add(5, "V");
            romanDic.Add(4, "IV");
            romanDic.Add(1, "I");
            return romanDic;
        }


        /// 

        /// Validates the Input
        /// 
        /// 
        /// 
        private static bool IsValid(string input)
        {
            int value = 0;
            bool isValid = false;
            if (int.TryParse(input, out value))
            {
                if (value <= 3000)
                {
                    isValid = true;
                }
            }
            return isValid;
        }
    }
}