std::iswalnum
提供: cppreference.com
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| Defined in header <cwctype>
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| int iswalnum( std::wint_t ch ); |
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与えられたワイド文字かどうかをチェックするには、英数字、すなわちいずれかの番号(
0123456789)、英大文字(ABCDEFGHIJKLMNOPQRSTUVWXYZ)、小文字(abcdefghijklmnopqrstuvwxyz)または現在のロケールに固有の任意の英数字です.Original:
Checks if the given wide character is an alphanumeric character, i.e. either a number (
0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz) or any alphanumeric 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.
目次 |
[編集] パラメータ
| ch | - | ワイド文字
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. |
[編集] 値を返します
ワイド文字は英数字の場合、非ゼロ値(true)、
0(false)その他のとき.Original:
Non-zero value (true) if the wide character is a alphanumeric 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.
[編集] 例
このコードを実行します
#include <iostream> #include <cwctype> #include <clocale> int main() { wchar_t c = L'\u13ad'; // the Cherokee letter HA ('Ꭽ') std::cout << std::hex << std::showbase << std::boolalpha; std::cout << "in the default locale, iswalnum(" << (std::wint_t)c << ") = " << (bool)std::iswalnum(c) << '\n'; std::setlocale(LC_ALL, "en_US.utf8"); std::cout << "in Unicode locale, iswalnum(" << (std::wint_t)c << ") = " << (bool)std::iswalnum(c) << '\n'; }
出力:
in the default locale, iswalnum(0x13ad) = false in Unicode locale, iswalnum(0x13ad) = true
[編集] 参照
| チェック文字はロケールによって英数字として分類されている場合 Original: checks if a character is classified as alphanumeric 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. (関数テンプレート) | |
| 文字かどうかをチェックするには、英数字です Original: checks if a character is alphanumeric The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数) | |
| C documentation for iswalnum
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| ASCII values (hex) |
characters |
isalnum |
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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
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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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| 9 | 0x09
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tab (\t)
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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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| 10 - 13 | 0x0A-0x0D
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whitespaces (\n,\v,\f,\r)
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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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| 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
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0
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0
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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
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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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| 33 - 47 | 0x21-0x2F
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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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| 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
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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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| 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
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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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| 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
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0
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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
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0
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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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