以下是使用Python实现此功能的示例代码：

def to_chinese(num):
    # 将数字转换为中文
    chinese_dict = {
        0: '零',
        1: '一',
        2: '二',
        # 添加更多数字及其对应的中文表示
        10: '十',
        100: '百',
        1000: '千',
        10000: '万',
        # 添加更多数字位数及其对应的中文表示
    }
    chinese_num = ''
    if num == 0:
        chinese_num = chinese_dict[num]
    else:
        quotient = num // 10
        remainder = num % 10
        if quotient > 0:
            if quotient == 1:
                chinese_num = chinese_dict[10]
            else:
                chinese_num = chinese_dict[quotient] + chinese_dict[10]
        if remainder > 0:
            chinese_num += chinese_dict[remainder]
    return chinese_num


def to_roman(num):
    # 将数字转换为罗马数字
    roman_dict = {
        1: 'I',
        5: 'V',
        10: 'X',
        # 添加更多数字及其对应的罗马数字表示
        50: 'L',
        100: 'C',
        500: 'D',
        1000: 'M',
    }
    roman_num = ''
    if num >= 1000:
        roman_num += 'M' * (num // 1000)
        num %= 1000
    if num >= 900:
        roman_num += 'CM'
        num -= 900
    elif num >= 500:
        roman_num += 'D' + 'C' * ((num - 500) // 100)
        num %= 100
    elif num >= 400:
        roman_num += 'CD'
        num -= 400
    if num >= 100:
        roman_num += 'C' * (num // 100)
        num %= 100
    if num >= 90