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    std::showpos, std::noshowpos

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    <metanoindex/>

     
    C++
     
    Input / Output-Bibliothek
    I / O-Manipulatoren
    C-style I / O
    Puffern
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    Buffers
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    basic_streambuf
    basic_filebuf
    basic_stringbuf
    strstreambuf(veraltet)
    Streams
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    Streams
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    Abstraktionen
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    Abstractions
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    ios_base
    basic_ios
    basic_istream
    basic_ostream
    basic_iostream
    Datei-I / O
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    File I/O
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    basic_ifstream
    basic_ofstream
    basic_fstream
    String I / O
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    String I/O
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    basic_istringstream
    basic_ostringstream
    basic_stringstream
    Array I / O
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    Array I/O
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    istrstream(veraltet)
    ostrstream(veraltet)
    strstream(veraltet)
    Types
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    Types
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    streamoff
    streamsize
    fpos
    Fehler Kategorie Schnittstelle
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    Error category interface
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    iostream_category(C++11)
    io_errc(C++11)
     
    Eingang / Ausgang Manipulatoren
    Gleitkomma-Formatierung
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    Floating-point formatting
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    Integer-Formatierung
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    Integer formatting
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    Boolean Formatierung
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    Boolean formatting
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    boolalpha
    noboolalpha
    Feldbreite und fill Kontrolle
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    Field width and fill control
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    Andere Formatierungen
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    Other formatting
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    Whitespace-Verarbeitung
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    Whitespace processing
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    Output Spülung
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    Output flushing
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    Statusflags Manipulation
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    Status flags manipulation
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    Zeit und Geld 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>
    definiert in Header <ios>
    std::ios_base& showpos( std::ios_base& str );
    		 (1)
    std::ios_base& noshowpos( std::ios_base& str );
    		 (2)
    Aktiviert oder deaktiviert die Anzeige von Pluszeichen '+' bei nicht-negativen Zahlen. showpos hat keine Auswirkung auf die Variable selbst.
    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)

    ermöglicht die showpos Flagge in den Strom str, als ob durch den Aufruf 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)

    deaktiviert die showpos Flagge in den Strom str, als ob durch den Aufruf 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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    Dies ist ein I / O-Manipulators, kann es mit einem Expressionsvektor wie out << std::showpos für jede out vom Typ std::basic_ostream oder mit einem Expressionsvektor wie in >> std::showpos für jede in vom Typ std::basic_istream aufgerufen werden .
    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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    Parameter

    str -
    Verweisen auf I / O-Strom
    Original:
    reference to I/O stream
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    Rückgabewert

    str (Verweis auf den Stream nach Manipulation)
    Original:
    str (reference to the stream after manipulation)
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    Beispiel

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

    Output: 

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

    Siehe auch
    löscht die angegebene ios_base Fahnen
    Original:
    clears the specified ios_base flags
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    (Funktion) [edit]
    Legt die angegebene ios_base Fahnen
    Original:
    sets the specified ios_base flags
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    (Funktion) [edit]