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c -\xFF 不在转义序列的可表示值范围内?

转载 作者:太空宇宙 更新时间:2023-11-04 08:06:16 28 4
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基于此:

The value of an octal or hexadecimal escape sequence shall be in the range of representable values for the type unsigned char for an integer character constant, or the unsigned type corresponding to wchar_t for a wide character constant.

八进制序列范围是 [0,255] for byte=8bits。

但他们进一步使用了一个例子:

EXAMPLE 3 Even if eight bits are used for objects that have type char, the construction '\x123' specifies an integer character constant containing only one character,

\x123 超过 255 这不是违反第一个约束吗?

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