The setlocale call determines the character set, error messages catalogs, monetary value formatting, numerical conventions, string collation, and alphabetic ordering.
可以调用setlocale来确定字符集、错误消息类别、货币值格式、数字转换、字符串校勘和字母排序。
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Ranges are named collections that are keyed by a numerical range limit and have a String value representing the name of the numerical range.