std::iswgraph
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在头文件 <cwctype> 中定义
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int iswgraph( std::wint_t ch ); |
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。检查是否给定的宽字符的图形表示,我。 E。它是一个数字(
0123456789
),大写字母(ABCDEFGHIJKLMNOPQRSTUVWXYZ
),小写字母(abcdefghijklmnopqrstuvwxyz
)一个标点符号(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
)的字符或图形,具体到当前的C语言环境.原文:
Checks if the given wide character has a graphical representation, i. e. it is either a number (
0123456789
), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ
), a lowercase letter (abcdefghijklmnopqrstuvwxyz
), a punctuation character(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
) or any graphical character specific to the current C locale.[编辑] 。参数。
ch | - | 。宽字符。
|
===。 返回值。===
。非0值(true)的宽字符的图形表示的字符,
0
(false),否则.原文:
Non-zero value (true) if the wide character has a graphical representation character,
0
(false) otherwise.[编辑] 。为例。
#include <iostream> #include <cwctype> #include <clocale> int main() { wchar_t c = L'\u2602'; // the Unicode character Umbrella ('☂') std::cout << std::hex << std::showbase << std::boolalpha; std::cout << "in the default locale, iswgraph(" << (std::wint_t)c << ") = " << (bool)std::iswgraph(c) << '\n'; std::setlocale(LC_ALL, "en_US.utf8"); std::cout << "in Unicode locale, iswgraph(" << (std::wint_t)c << ") = " << (bool)std::iswgraph(c) << '\n'; }
输出:
in the default locale, iswgraph(0x2602) = false in Unicode locale, iswgraph(0x2602) = true
[编辑] 。另请参阅。
如果一个字符的检查点分类为图形的语言环境 原文: checks if a character is classfied as graphical by a locale (函数模板) | |
一个字符的检查,如果是一个图形字符 原文: checks if a character is a graphical character (函数) | |
C documentation for iswgraph
|
ASCII values (hex) |
characters |
isgraph |
||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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
|