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std::islower

提供: cppreference.com
< cpp‎ | string‎ | byte

 
 
ストリングスライブラリ
NULLで終わる文字列
Original:
Null-terminated strings
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バイト文字列
文字列をマルチバイト
ワイド文字列
クラス
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Classes
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basic_string
char_traits
 
NULL終端バイト文字列
機能します
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Functions
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文字操作
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Character manipulation
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数値形式への変換
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Conversions to numeric formats
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文字列操作
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
文字列の検査
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String examination
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メモリ操作
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
その他
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Miscellaneous
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strerror
 
Defined in header <cctype>
int islower( int ch );
指定された文字かどうかをチェックするには、現在のCロケールに従って小文字として分類されます。デフォルトの "C"ロケールでは、islowerは小文字(abcdefghijklmnopqrstuvwxyz)にのみtrueを返します。.
Original:
Checks if the given character is classified as a lowercase character according to the current C locale. In the default "C" locale, islower returns true only for the lowercase letters (abcdefghijklmnopqrstuvwxyz).
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islower戻りtrue、それが保証されている場合は、そのiscntrlisdigitispunct、同じCロケールにおいては、同一文字に対してisspaceリターンfalse.
Original:
If islower returns true, it is guaranteed that iscntrl, isdigit, ispunct, and isspace return false for the same character in the same C locale.
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目次

[編集] パラメータ

ch -
文字
Original:
character
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[編集] 値を返します

文字が小文字の場合はゼロ以外の値(true)、0false)その他のとき.
Original:
Non-zero value (true) if the character is a lowercase letter, 0 (false) otherwise.
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[編集]

#include <iostream>
#include <cctype>
#include <clocale>
 
int main()
{
    char c = '\xe5'; // letter å in ISO-8859-1
 
    std::cout << "islower(\'\\xe5\', default C locale) returned "
               << std::boolalpha << (bool)std::islower(c) << '\n';
 
    std::setlocale(LC_ALL, "en_GB.iso88591");
    std::cout << "islower(\'\\xe5\', ISO-8859-1 locale) returned "
              << std::boolalpha << (bool)std::islower(c) << '\n';
 
}

Output:

islower('\xe5', default C locale) returned false
islower('\xe5', ISO-8859-1 locale) returned true

[編集] も参照してください

チェック文字はロケールによって小文字として分類されている場合
Original:
checks if a character is classified as lowercase by a locale
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(関数テンプレート) [edit]
ワイド文字かどうかをチェックするには、小文字です
Original:
checks if a wide character is lowercase
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(機能) [edit]
C documentation for islower
ASCII values
(hex)
characters

iscntrl
iswcntrl

isprint
iswprint

isspace
iswspace

isblank
iswblank

isgraph
iswgraph

ispunct
iswpunct

isalnum
iswalnum

isalpha
iswalpha

isupper
iswupper

islower
iswlower

isdigit
iswdigit

isxdigit
iswxdigit

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