std::isalpha
Материал из cppreference.com
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| Заголовочный файл <cctype>
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| int isalpha( int ch ); |
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Проверяет, является ли данный символ является символом буквы, в зависимости от установленного языка C. В локали по умолчанию, эта функция возвращает true для писем
ABCDEFGHIJKLMNOPQRSTUVWXYZ и abcdefghijklmnopqrstuvwxyz.Original:
Checks if the given character is an alphabetic character according to the currently installed C locale. In the default locale, this function returns true for the letters
ABCDEFGHIJKLMNOPQRSTUVWXYZ and abcdefghijklmnopqrstuvwxyz.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 | - | характер
Original: 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
Номера для нулевого значения (true), если символ буквенный символ,
0 (false) в противном случае.Original:
Non-zero value (true) if the character is an alphabetic character,
0 (false) 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 <cctype> #include <clocale> int main() { char c = '\xdf'; // German letter ß in ISO-8859-1 std::cout << "isalpha(\'\\xdf\', default C locale) returned " << std::boolalpha << (bool)std::isalpha(c) << '\n'; std::setlocale(LC_ALL, "de_DE.iso88591"); std::cout << "isalpha(\'\\xdf\', ISO-8859-1 locale) returned " << std::boolalpha << (bool)std::isalpha(c) << '\n'; }
Вывод:
isalpha('\xdf', default C locale) returned false
isalpha('\xdf', ISO-8859-1 locale) returned 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 широкий символ буквенный Original: checks if a wide 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 isalpha
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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
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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
|
0
|
0
|
0
|
0
|
0
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| 10 - 13 | 0x0A-0x0D
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whitespaces (\n,\v,\f,\r)
|
≠0
|
0
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≠0
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0
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0
|
0
|
0
|
0
|
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
|
0
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0
|
0
|
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
|
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
|
| 48 - 57 | 0x30-0x39
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0123456789
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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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≠0
|
0
|
0
|
0
|
≠0
|
≠0
|
| 58 - 64 | 0x3a-0x40
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:;<=>?@
|
0
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≠0
|
0
|
0
|
≠0
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≠0
|
0
|
0
|
0
|
0
|
0
|
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
|
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
|
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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| 97 -102 | 0x61-0x66
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abcdef
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0
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≠0
|
0
|
0
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≠0
|
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
|
0
|
≠0
|
0
|
0
|
| 123-126 | 0x7B-0x7E
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{|}~
|
0
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≠0
|
0
|
0
|
≠0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
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
|
0
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0
|
0
|
0
|
0
|
0
|
0
|
0
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