Espaces de noms
Variantes

    std::isalpha

    De cppreference.com

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    <metanoindex/>

     
    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
    Original:
    Classes
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    basic_string
    char_traits
     
    Chaînes d'octets à zéro terminal
    Fonctions
    Original:
    Functions
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    Manipulation caractère
    Original:
    Character manipulation
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    Conversion aux formats numériques
    Original:
    Conversions to numeric formats
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    La manipulation de chaînes
    Original:
    String manipulation
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    strcpy
    strncpy
    strcat
    strncat
    strxfrm
    Examen chaîne
    Original:
    String examination
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    Manipulation de la mémoire
    Original:
    Memory manipulation
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    memchr
    memcmp
    memset
    memcpy
    memmove
    Divers
    Original:
    Miscellaneous
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    strerror
     
    <tbody> </tbody>
    Déclaré dans l'en-tête <cctype>
    int isalpha( int ch );
    Vérifie si le caractère donné est un caractère alphabétique en fonction de la locale C actuellement installé. Dans la langue par défaut, cette fonction retourne true pour les lettres et ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .
    Original:
    Checks if the given character is an alphabetic character according to the currently installed C locale. In the default locale, this function returns true for the letters ABCDEFGHIJKLMNOPQRSTUVWXYZ and abcdefghijklmnopqrstuvwxyz.
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    Paramètres

    ch -
    caractère
    Original:
    character
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    Retourne la valeur

    Valeur non nulle (true) si le caractère est un caractère alphabétique, 0 (false) autrement .
    Original:
    Non-zero value (true) if the character is an alphabetic character, 0 (false) otherwise.
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    Exemple

    #include <iostream>
#include <cctype> 
#include <clocale>
         
int main()
{        
    char c = '\xdf'; // German letter ß in ISO-8859-1
 
    std::cout << "isalpha(\'\\xdf\', default C locale) returned "
               << std::boolalpha << (bool)std::isalpha(c) << '\n';

    std::setlocale(LC_ALL, "de_DE.iso88591");
    std::cout << "isalpha(\'\\xdf\', ISO-8859-1 locale) returned "
              << std::boolalpha << (bool)std::isalpha(c) << '\n';
    
}

    Résultat : 

    isalpha('\xdf', default C locale) returned false
isalpha('\xdf', ISO-8859-1 locale) returned true

    Voir aussi
    vérifie si un caractère alphabétique est classé comme par un paramètre régional
    Original:
    checks if a character is classified as alphabetic by a locale
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    (fonction générique) [edit]
    vérifie si un caractère large est alphabétique
    Original:
    checks if a wide character is alphabetic
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