用C#寫一個RomanNumbers的控制臺程序，提供基本羅馬數字到十進制數的映射關系，然后給出一些約束，然后對于1到5000的十進制整數，能轉換成相應的羅馬數字。 基本羅馬數字和十進制數的對應關系 I??????????????????????? 1 V?????????????????????? 5 X????????????????????? 10 L?????????????????????? 50 C????????????????????? 100 D????????????????????? 500 M????????????????????? 1000 約束 1. 如果一個代表數字小的字母放在代表數字大的字母的前面，則表示減法，例如CM就表示900 2. 一個字母最多只能重復3次 程序 ~~~ public static string ConvertDecimalToRoman(int number) { int[] decArray = {1000,900,500,400,100,90,50,40,10,9,5,4,1}; string[] romAarry = { "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I" }; int i = 0; string output = ""; while (number > 0) { while (number >= decArray[i]) { number = number - decArray[i]; output = output + romAarry[i]; } i++; } return output; } ~~~ 測試數據 7??????????????????????? VII 1981???????????????? MCMLXXXI 99???????????????????? XCIX 700?????????????????? DCC 經測試，測試數據全部通過。