美元大写转换器

美元大写转换器可以将金额转换为英文大写形式，以下是一个简单的示例，用于将美元金额转换为英文大写：

```python

def number_to_english(num):

under_20 = ['Zero', 'One', 'Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight', 'Nine', 'Ten',

'Eleven', 'Twelve', 'Thirteen', 'Fourteen', 'Fifteen', 'Sixteen', 'Seventeen', 'Eighteen', 'Nineteen']

tens = ['', '', 'Twenty', 'Thirty', 'Forty', 'Fifty', 'Sixty', 'Seventy', 'Eighty', 'Ninety']

def convert_hundreds(n):

if n == 0:

return ''

elif n < 20:

return under_20[n]

elif n < 100:

return tens[n // 10] + ('' if n % 10 == 0 else ' ' + under_20[n % 10])

else:

return under_20[n // 100] + ' Hundred' + ('' if n % 100 == 0 else ' ' + convert_hundreds(n % 100))

if num == 0:

return 'Zero'

elif num < 1000:

return convert_hundreds(num)

else:

return convert_hundreds(num // 1000) + ' Thousand' + ('' if num % 1000 == 0 else ' ' + convert_hundreds(num % 1000))

def usd_to_english(num):

if num < 0:

return 'Invalid amount'

if num >= 1000000000:

return 'Amount too large'

num_str = f"{num:012.2f