Padding sets the padding character.
padding设置用于填补的字符。
Currency separators include the thousands separators, decimal separators, decimal position, field length, and padding character.
货币分隔符包括千位分隔符、小数点、小数位置、字段长度和填充字符。
The sample implementation USES a blank space (" ") as the character for padding.
样本实现使用空格(“ ”)作为填充字符。
For character strings, padding is with blanks; for bit strings, it is with zeros.
对于字符串，填充的是空格字符；对于位串，填充的是零。
For character strings, padding is with blanks; for bit strings, it is with zeros.
对于字符串，填充的是空格字符；对于位串，填充的是零。
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