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std::isspace

Defined in header <cctype>

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)

iswspace

checks if a wide character is a space character (function)

c isspace文档

ASCII values (hex)

characters

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

control codes (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

whitespaces (\n,\v,\f,\r)

≠0

0

≠0

0

0

0

0

0

0

0

0

0

14 - 31

0x0E-0x1F

control codes

≠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

backspace character (DEL)

≠0

0

0

0

0

0

0

0

0

0

0

0

代码语言:txt
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