编程实现百元发票小写转大写

以下是Python代码实现：

def convert(amount):
    units = ['', '拾', '佰', '仟']
    digits = ['', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖']
    decimal = ['角', '分']
    result = ''
    yuan = int(amount)
    jiao = int(round((amount - yuan) * 100))
    if yuan == 0:
        result += '零元'
    else:
        yuan_str = str(yuan)
        length = len(yuan_str)
        for i in range(length):
            d = int(yuan_str[i])
            unit = units[length - 1 - i]
            if d != 0:
                result += digits[d] + unit
            if i == length - 1 and len(unit) == 0:
                result += '元'
    if jiao == 0:
        result += '整'
    else:
        jiao_str = str(jiao)
        if jiao < 10:
            jiao_str = '0' + jiao_str
        for i in range(2):
            d = int(jiao_str[i])
            if d != 0:
                result += digits[d] + decimal[i]
    return result

使用示例：

print(convert(123.45))  # 壹佰贰拾叁元肆角伍分
print(convert(100))     # 壹佰元整
print(convert(0.99))    # 捌角玖分
print(convert(0))       # 零元整