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std::islower

De cppreference.com
< cpp‎ | string‎ | byte

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C++
 
Bibliothèque de chaînes de caractères
Chaînes à zéro terminal
Original:
Null-terminated strings
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Les chaînes d'octets
Chaines multi-octets
Les chaînes étendues
Classes
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Classes
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basic_string
char_traits
 
Chaînes d'octets à zéro terminal
Fonctions
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Functions
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Manipulation caractère
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Character manipulation
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Conversion aux formats numériques
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Conversions to numeric formats
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La manipulation de chaînes
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
Examen chaîne
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String examination
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Manipulation de la mémoire
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Divers
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Miscellaneous
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strerror
 
Déclaré dans l'en-tête <cctype>
int islower( int ch );
Vérifie si le caractère donné est classé comme un caractère en minuscule en fonction de la localisation en cours C. Dans la valeur par défaut "C", islower retourne true uniquement pour les lettres minuscules (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 islower retours true, il est garanti que iscntrl, isdigit, ispunct et isspace retour false de la même nature dans la même zone 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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Sommaire

[modifier] Paramètres

ch -
caractère
Original:
character
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[modifier] Retourne la valeur

Valeur non nulle (true) si le caractère est une lettre minuscule, 0 (false) autrement .
Original:
Non-zero value (true) if the character is a lowercase letter, 0 (false) otherwise.
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[modifier] Exemple

#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';
 
}

Résultat : 

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

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