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在头文件 |
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int iswblank(wint_t ch); |
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(自C99以来) |
检查给定的宽字符是否被当前的C语言环境分类为空字符(即,用于分隔句子中的单词的空白字符)。在默认的C语言环境中,只有空格(0x20
)和水平制表符(0x09
)是空白字符。
CH |
- |
宽字符 |
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如果宽字符是空字符,则为非零值,否则为零。
#include#include #include #include int main(void){ wchar_t c = L'\u3000'; // Ideographic space (' ') printf("in the default locale, iswblank(%#x) = %d\n", c, !!iswblank(c)); setlocale(LC_ALL, "en_US.utf8"); printf("in Unicode locale, iswblank(%#x) = %d\n", c, !!iswblank(c));}
输出:
in the default locale, iswblank(0x3000) = 0in Unicode locale, iswblank(0x3000) = 1
C11标准(ISO / IEC 9899:2011):
7.30.2.1.3 iswblank函数(p:449)
C99标准(ISO / IEC 9899:1999):
7.25.2.1.3 iswblank函数(p:395)
isblank(C99) |
检查一个字符是否为空字符(函数) |
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| iswblank的C ++文档 |
ASCII 值 (十六进制) |
字符 |
iscntrl iswcntrl. |
isprint iswprint. |
isspace iswspace. |
isblank iswblank. |
isgraph iswgraph. |
ispunct iswpunct. |
isalnum iswalnum. |
isalpha iswalpha. |
isupper iswupper. |
islower iswlower. |
isdigit iswdigit. |
isxdigit iswxdigit. |
|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 - 8 |
0x00-0x08 |
控制码 (NUL, etc.) |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
9 |
0x09 |
tab (\t) |
≠0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
10 - 13 |
0x0A-0x0D |
空格 (\n,\v,\f,\r) |
≠0 |
0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
14 - 31 |
0x0E-0x1F |
控制码 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
32 |
0x20 |
space |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
33 - 47 |
0x21-0x2F |
!"#$%&'()*+,-./ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
48 - 57 |
0x30-0x39 |
0123456789 |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
0 |
0 |
0 |
≠0 |
≠0 |
58 - 64 |
0x3a-0x40 |
:;<=>?@ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
65 - 70 |
0x41-0x46 |
ABCDEF |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
≠0 |
71 - 90 |
0x47-0x5A |
GHIJKLMNOPQRSTUVWXYZ |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
0 |
91 - 96 |
0x5B-0x60 |
[]^_` | 0 | ≠0 | 0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | |
||||||||||||
97 -102 |
0x61-0x66 |
abcdef |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
0 |
≠0 |
0 |
≠0 |
103-122 |
0x67-0x7A |
ghijklmnopqrstuvwxyz |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
0 |
≠0 |
0 |
0 |
123-126 |
0x7B-0x7E |
{|}~ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
127 |
0x7F |
退格 (DEL) |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |