std::iswalpha
Материал из cppreference.com
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| Заголовочный файл <cwctype>
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| int iswalpha( std::wint_t ch ); |
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Проверяет, является ли данная широкий характер буквы, то есть либо прописной буквы (
ABCDEFGHIJKLMNOPQRSTUVWXYZ), строчными буквами (abcdefghijklmnopqrstuvwxyz) или любые буквы, специфичные для текущей локали.Original:
Checks if the given wide character is an alphabetic character, i.e. either an uppercase letter (
ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz) or any alphabetic character specific to the current locale.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Содержание |
[править] Параметры
| ch | - | широкий характер
Original: wide character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[править] Возвращаемое значение
Non-нулевое значение, если широкий характер буквы,
0 иначе.Original:
Non-zero value if the wide character is a alphabetic character,
0 otherwise.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[править] Пример
#include <iostream> #include <cwctype> #include <clocale> int main() { wchar_t c = L'\u0b83'; // Tamil sign Visarga ('ஃ') std::cout << std::hex << std::showbase << std::boolalpha; std::cout << "in the default locale, iswalpha(" << (std::wint_t)c << ") = " << (bool)std::iswalpha(c) << '\n'; std::setlocale(LC_ALL, "en_US.utf8"); std::cout << "in Unicode locale, iswalpha(" << (std::wint_t)c << ") = " << (bool)std::iswalpha(c) << '\n'; }
Вывод:
in the default locale, iswalpha(0xb83) = false in Unicode locale, iswalpha(0xb83) = true
[править] См. также
| проверяет, является ли символ классифицируется как алфавитном на местности Original: checks if a character is classified as alphabetic by a locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (шаблон функции) | |
| проверяет, является ли символ буквенный Original: checks if a character is alphabetic The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция) | |
| C документация для iswalpha
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| ASCII values (hex) |
characters |
isalpha |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 - 8 | 0x00-0x08
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control codes (NUL, etc.)
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≠0
|
0
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0
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0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 9 | 0x09
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tab (\t)
|
≠0
|
0
|
≠0
|
≠0
|
0
|
0
|
0
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0
|
0
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0
|
0
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0
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| 10 - 13 | 0x0A-0x0D
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whitespaces (\n,\v,\f,\r)
|
≠0
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0
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≠0
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0
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0
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0
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0
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0
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0
|
0
|
0
|
0
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| 14 - 31 | 0x0E-0x1F
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control codes | ≠0
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0
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0
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0
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0
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0
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0
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0
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0
|
0
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0
|
0
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| 32 | 0x20
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space | 0
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≠0
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≠0
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≠0
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0
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0
|
0
|
0
|
0
|
0
|
0
|
0
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| 33 - 47 | 0x21-0x2F
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!"#$%&'()*+,-./
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0
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≠0
|
0
|
0
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≠0
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≠0
|
0
|
0
|
0
|
0
|
0
|
0
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| 48 - 57 | 0x30-0x39
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0123456789
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0
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≠0
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0
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0
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≠0
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0
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≠0
|
0
|
0
|
0
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≠0
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≠0
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| 58 - 64 | 0x3a-0x40
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:;<=>?@
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0
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≠0
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0
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0
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≠0
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≠0
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0
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0
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0
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0
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0
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0
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| 65 - 70 | 0x41-0x46
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ABCDEF
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0
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≠0
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0
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0
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≠0
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0
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≠0
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≠0
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≠0
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0
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0
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≠0
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| 71 - 90 | 0x47-0x5A
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GHIJKLMNOPQRSTUVWXYZ
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0
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≠0
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0
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0
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≠0
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0
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≠0
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≠0
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≠0
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0
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0
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0
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| 91 - 96 | 0x5B-0x60
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[\]^_`
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0
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≠0
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0
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0
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≠0
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≠0
|
0
|
0
|
0
|
0
|
0
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0
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| 97 -102 | 0x61-0x66
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abcdef
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0
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≠0
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0
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0
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≠0
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0
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≠0
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≠0
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0
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≠0
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0
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≠0
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| 103-122 | 0x67-0x7A
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ghijklmnopqrstuvwxyz
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0
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≠0
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0
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0
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≠0
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0
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≠0
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≠0
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0
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≠0
|
0
|
0
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| 123-126 | 0x7B-0x7E
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{|}~
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0
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≠0
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0
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0
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≠0
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≠0
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0
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0
|
0
|
0
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0
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0
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| 127 | 0x7F
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backspace character (DEL)
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≠0
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0
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0
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0
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0
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0
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0
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0
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0
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0
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0
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0
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