Number To Roman - CSharp System

CSharp examples for System:Math Number

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Description

Number To Roman

Demo Code


using System.Text;
using System.Xml;
using System.Linq;
using System.Diagnostics;
using System.IO;/*from  w ww  .ja va2s  .  co m*/
using System.Collections.Generic;
using System;

public class Main{
        // Converts an integer value into Roman numerals
        public static string NumberToRoman(int number)
        {
            // Validate
            if (number < 0 || number > 3999)
                throw new ArgumentException("Value must be in the range 0 - 3,999.");

            if (number == 0) return "N";

            // Set up key numerals and numeral pairs
            int[] values = new int[] { 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 };
            string[] numerals = new string[] { "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I" };

            // Initialise the string builder
            StringBuilder result = new StringBuilder();

            // Loop through each of the values to diminish the number
            for (int i = 0; i < 13; i++)
            {
                // If the number being converted is less than the test value, append
                // the corresponding numeral or numeral pair to the resultant string
                while (number >= values[i])
                {
                    number -= values[i];
                    result.Append(numerals[i]);
                }
            }

            // Done
            return result.ToString();
        }
        #endregion

        #region Number To Roman Numerals
        public static string NumberToRoman(double number)
        {
            int num = (int)number;
            return NumberToRoman(num);
        }
}

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