std::isdigit
Материал из cppreference.com
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| Заголовочный файл <cctype>
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| int isdigit( int ch ); |
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Проверяет, является ли данный символ является одним из 10 десятичных цифр:
0123456789.Original:
Checks if the given character is one of the 10 decimal digits:
0123456789.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 является цифрой,
0 (false) в противном случае.Original:
Non-zero value (true) if the character is a numeric 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] Notes
isdigit и isxdigit являются только стандартные узкий характер классификации функций, которые не зависят от установленной локали C. хотя в некоторых реализациях (например, Microsoft в 1252 кодовую страницу) может классифицировать дополнительные однобайтовые символы как цифры. Original:
isdigit and isxdigit are the only standard narrow character classification functions that are not affected by the currently installed C locale. although some implementations (e.g. Microsoft in 1252 codepage) may classify additional single-byte characters as digits. The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[править] См. также
| проверяет, является ли символ классифицируется как цифры на местности Original: checks if a character is classified as a digit 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 является цифрой Original: checks if a wide character is a digit 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 isdigit
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| ASCII values (hex) |
characters |
isdigit |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 - 8 | 0x00-0x08
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control codes (NUL, etc.)
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≠0
|
0
|
0
|
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
|
| 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
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control codes | ≠0
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0
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0
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0
|
0
|
0
|
0
|
0
|
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
|
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
|
≠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
|
0
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≠0
|
0
|
0
|
0
|
≠0
|
≠0
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| 58 - 64 | 0x3a-0x40
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:;<=>?@
|
0
|
≠0
|
0
|
0
|
≠0
|
≠0
|
0
|
0
|
0
|
0
|
0
|
0
|
| 65 - 70 | 0x41-0x46
|
ABCDEF
|
0
|
≠0
|
0
|
0
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≠0
|
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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| 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
|
0
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| 91 - 96 | 0x5B-0x60
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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
|
| 97 -102 | 0x61-0x66
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abcdef
|
0
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≠0
|
0
|
0
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≠0
|
0
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≠0
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≠0
|
0
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≠0
|
0
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≠0
|
| 103-122 | 0x67-0x7A
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ghijklmnopqrstuvwxyz
|
0
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≠0
|
0
|
0
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≠0
|
0
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≠0
|
≠0
|
0
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≠0
|
0
|
0
|
| 123-126 | 0x7B-0x7E
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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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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
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0
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0
|
0
|
0
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0
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