Espaces de noms
Variantes

    std::showpos, std::noshowpos

    De cppreference.com
    < cpp | io | manip

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    <metanoindex/>

     
    C++
     
    D'entrée / sortie de bibliothèque
    I / O manipulateurs
    C-style I / O
    Tampons
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    Buffers
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    basic_streambuf
    basic_filebuf
    basic_stringbuf
    strstreambuf (obsolète)
    Cours d'eau
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    Streams
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    Abstractions
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    Abstractions
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    ios_base
    basic_ios
    basic_istream
    basic_ostream
    basic_iostream
    Fichier E / O
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    File I/O
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    basic_ifstream
    basic_ofstream
    basic_fstream
    Chaîne I / O
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    String I/O
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    basic_istringstream
    basic_ostringstream
    basic_stringstream
    Tableau I / O
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    Array I/O
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    istrstream (obsolète)
    ostrstream (obsolète)
    strstream (obsolète)
    Types
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    Types
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    streamoff
    streamsize
    fpos
    Interface catégorie d'erreur
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    Error category interface
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    iostream_category (C++11)
    io_errc (C++11)
     
    D'entrée / sortie manipulateurs
    À virgule flottante en forme
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    Floating-point formatting
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    Formatage entier
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    Integer formatting
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    Formatage booléen
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    Boolean formatting
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    boolalpha
    noboolalpha
    Largeur de champ et de contrôle de remplissage
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    Field width and fill control
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    Autre mise en forme
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    Other formatting
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    Traitement des espaces blancs
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    Whitespace processing
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    Sortie de rinçage
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    Output flushing
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    Indicateurs d'état manipulation
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    Status flags manipulation
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    Temps et d'argent I / O
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    Time and money I/O
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    get_money (C++11)
    get_time (C++11)
    put_money (C++11)
    put_time (C++11)
     
    <tbody> </tbody>
    Déclaré dans l'en-tête <ios>
    std::ios_base& showpos( std::ios_base& str );
    		 (1)
    std::ios_base& noshowpos( std::ios_base& str );
    		 (2)
    Active ou désactive l'affichage de la '+' signe plus dans la non-sortie négative entier. N'a aucun effet sur entrée .
    Original:
    Enables or disables the display of the plus sign '+' in non-negative integer output. Has no effect on input.
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    1)

    permet le drapeau showpos dans le flux str comme si en appelant str.setf(std::ios_base::showpos)
    Original:
    enables the showpos flag in the stream str as if by calling str.setf(std::ios_base::showpos)
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    2)

    désactive le drapeau showpos dans le flux str comme si en appelant str.unsetf(std::ios_base::showpos)
    Original:
    disables the showpos flag in the stream str as if by calling str.unsetf(std::ios_base::showpos)
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    Il s'agit d'un manipulateur d'E / S, il peut être appelé avec une expression telle que pour tout out << std::showpos out de std::basic_ostream type ou d'une expression telle que pour tout in >> std::showpos in de std::basic_istream type .
    Original:
    This is an I/O manipulator, it may be called with an expression such as out << std::showpos for any out of type std::basic_ostream or with an expression such as in >> std::showpos for any in of type std::basic_istream.
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    Paramètres

    str -
    référence aux flux d'entrée / sortie
    Original:
    reference to I/O stream
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    Retourne la valeur

    str (référence au flux après la manipulation)
    Original:
    str (reference to the stream after manipulation)
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    Exemple

    #include <iostream>
int main()
{
        std::cout << "showpos: " << std::showpos << 42 << ' ' << 3.14 << ' ' << 0 << '\n'
                  << "noshowpos: " << std::noshowpos << 42 << ' ' << 3.14 << ' ' << 0 << '\n';
}

    Résultat : 

    showpos: +42 +3.14 +0
noshowpos: 42 3.14 0

    Voir aussi
    efface les drapeaux ios_base spécifiées
    Original:
    clears the specified ios_base flags
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    (fonction) [edit]
    fixe les drapeaux ios_base spécifiées
    Original:
    sets the specified ios_base flags
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    (fonction) [edit]