阿拉伯數字到羅馬數字在線轉換工具

這個在線阿拉伯數字到羅馬數字轉換工具可幫助您將一個阿拉伯數字轉換為羅馬數字. 輸入阿拉伯數字, 羅馬數字會顯示在結果框中.

羅馬數字用拉丁字母代表數字("I" 代表"1", "V" 代表"5", "X" 代表"10", "L" 代表"50", "C" 代表"100", "D" 代表"500", "M" 代表"1000") .羅馬數字系統經常用在論文和書籍排序中.

1. 步驟1:按順序記住拉丁字母代表的數值["M": 1000, "CM": 900, "D": 500, "CD": 400, "C": 100, "XC": 90, "L": 50, "XL": 40, "X": 10, "IX": 9, "V": 5, "IV": 4, "I": 1] .

2. 步驟2:從左到右,嘗試減去最大的數值並重複,直到餘0.

例1:阿拉伯數字"424"轉換為羅馬數字:

例2:阿拉伯數字"2019"轉換為羅馬數字:

維基百科(羅馬數字系統): https://en.wikipedia.org/wiki/Roman_numerals

def transform_number_to_roman_numeral(number):
    roman_value_list = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1]
    roman_char_list = ["M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"]
    res = ''
    for i in range(len(roman_value_list)):
        while number >= roman_value_list[i]:
            number -= roman_value_list[i]
            res += roman_char_list[i]
    return res


number_input = 987
roman_numeral_output = transform_number_to_roman_numeral(number_input)
print('number {0} equal to:{1}'.format(number_input, roman_numeral_output))

-------------------
number 987 equal to:CMLXXXVII

public class NumberConvertManager {
    public static String transform_number_to_roman_numeral(int number) {
        int[] roman_value_list = new int[]{1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
        String[] roman_char_list = new String[]{"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
        StringBuilder res = new StringBuilder();
        for (int i = 0; i < roman_value_list.length; i += 1) {
            while (number >= roman_value_list[i]){
                number -= roman_value_list[i];
                res.append(roman_char_list[i]);
            }
        }
        return res.toString();
    }

    public static void main(String[] args) {
        int number_input = 987;
        String roman_numeral_output = transform_number_to_roman_numeral(number_input);
        System.out.println("number " + number_input + " equal to:" + roman_numeral_output);
    }
}

-------------------
number 987 equal to:CMLXXXVII