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    std::getenv

    De cppreference.com
     
    C++
     
    Bibliothèque d'utilitaires
     
    Services d'appui aux programmes
    La fin du programme
    Original:
    Program termination
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    abort
    exit
    quick_exit (C++11)
    _Exit (C++11)
    Communiquer avec l'environnement
    Original:
    Communicating with the environment
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    Signaux
    Original:
    Signals
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    Types de signaux
    Original:
    Signal types
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    SIGABRT
    SIGFPE
    SIGILL
    SIGINT
    SIGSEGV
    SIGTERM
    Non-locales sauts
    Original:
    Non-local jumps
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    setjmp
    longjmp
    Types
    Original:
    Types
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    jmp_buf
     
    <tbody> </tbody>
    Déclaré dans l'en-tête <cstdlib>
    const char *getenv( const char *env_var );
    Recherche une variable d'environnement avec env_var nom de l'hôte spécifié par la liste environnement et renvoie des informations qui lui sont associés. L'ensemble des variables d'environnement et les méthodes de l'altérer sont définis par l'implémentation .
    Original:
    Searches for an environmental variable with name env_var in the host-specified environment list and returns information associated with it. The set of environmental variables and methods of altering it are implementation-defined.
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    Paramètres

    env_var -
    chaîne de caractères terminée par NULL identifier le nom de la variable d'environnement qu'il faut chercher
    Original:
    null-terminated character string identifying the name of the environmental variable to look for
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    Retourne la valeur

    Chaîne de caractères identifiant la valeur de la variable d'environnement ou NULL si la variable n'est pas trouvée .
    Original:
    Character string identifying the value of the environmental variable or NULL if such variable is not found.
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    Exemple

    #include <iostream>
#include <cstdlib>

int main(int argc, char *argv[])
{
    std::cout << "Your PATH is: " << std::getenv("PATH") << std::endl;
}
    See More

    Résultat possible : 

    Your PATH is: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

    Voir aussi

    C documentation for getenv