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std::islower

De cppreference.com
< cpp‎ | string‎ | byte

 
 
Strings biblioteca
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Null-terminated strings
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Classes
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basic_string
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Functions
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De manipulación de caracteres
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Character manipulation
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Conversions to numeric formats
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String manipulation
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Defined in header <cctype>
int islower( int ch );
Comprueba si el carácter dado se clasifica como una minúscula de acuerdo con la actual configuración regional C. En el valor predeterminado "C", islower devuelve true sólo para las letras minúsculas (abcdefghijklmnopqrstuvwxyz) .
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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Si vuelve islower true, se garantiza que iscntrl, isdigit, ispunct y isspace retorno false para el mismo personaje en la misma localidad C .
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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Contenido

[editar] Parámetros

ch -
carácter
Original:
character
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[editar] Valor de retorno

Valor distinto de cero (true) si el carácter es una letra minúscula, 0 (false) de otra manera .
Original:
Non-zero value (true) if the character is a lowercase letter, 0 (false) otherwise.
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[editar] Ejemplo

#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

[editar] Ver también

Comprueba si un carácter está clasificado como minúsculas por una configuración regional
Original:
checks if a character is classified as lowercase by a locale
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(función de plantilla) [edit]
Comprueba si un carácter ancho es minúscula
Original:
checks if a wide character is lowercase
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(función) [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