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std::isspace

STD：：isspace

Defined in header ​​
int isspace( int ch ​​

检查给定字符是否为按当前安装的C语言环境分类的空白字符。在默认区域设置中，空格字符如下：

  • 空间%280x20，，，' '%29

  • 表格饲料%280x0c，，，'\f'%29

  • 线路进给%280x0a，，，'\n'%29

  • 回车率%280x0d，，，'\r'%29

  • 水平标签%280x09，，，'\t'%29

  • 垂直标签%280x0b，，，'\v'%29

如果ch不能表示为unsigned char不等于EOF...

参数

ch-character to classify

返回值

如果字符是空白字符，则为零。

另见

isspace(std::locale)checks if a character is classified as whitespace by a locale (function template)
iswspacechecks if a wide character is a space character (function)

c isspace文档

ASCII values (hex)charactersiscntrl iswcntrl.isprint iswprint.isspace iswspace.isblank iswblank.isgraph iswgraph.ispunct iswpunct.isalnum iswalnum.isalpha iswalpha.isupper iswupper.islower iswlower.isdigit iswdigit.isxdigit iswxdigit.
0 - 80x00-0x08control codes (NUL, etc.)≠00000000000
90x09tab (\t)≠00≠0≠00000000
10 - 130x0A-0x0Dwhitespaces (\n,\v,\f,\r)≠00≠000000000
14 - 310x0E-0x1Fcontrol codes≠00000000000
320x20space0≠0≠0≠00000000
33 - 470x21-0x2F!"#$%&'()*+,-./0≠000≠0≠000000
48 - 570x30-0x3901234567890≠000≠00≠0000≠0
58 - 640x3a-0x40:;<=>?@0≠000≠0≠000000
65 - 700x41-0x46ABCDEF0≠000≠00≠0≠0≠000
71 - 900x47-0x5AGHIJKLMNOPQRSTUVWXYZ0≠000≠00≠0≠0≠000
91 - 960x5B-0x60[]^_` | 0 | ≠0 | 0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 |
97 -1020x61-0x66abcdef0≠000≠00≠0≠00≠00
103-1220x67-0x7Aghijklmnopqrstuvwxyz0≠000≠00≠0≠00≠00
123-1260x7B-0x7E{|}~0≠000≠0≠000000
1270x7Fbackspace character (DEL)≠00000000000

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