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    std::bitset::operator[]

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    <metanoindex/>

     
    C++
     
    Utilities-Bibliothek
     
    std::bitset
    Mitglied Typen
    Original:
    Member types
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    bitset::reference
    Member-Funktionen
    Original:
    Member functions
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    bitset::bitset
    bitset::operator==
    bitset::operator!=
    Elementzugriff zerstört
    Original:
    Element access
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    bitset::operator[]
    bitset::test
    bitset::all
    bitset::any
    bitset::none    		(C++11)

     
    bitset::count
    Kapazität
    Original:
    Capacity
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    bitset::size
    Modifiers
    Original:
    Modifiers
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    bitset::operator&=
    bitset::operator|=
    bitset::operator^=
    bitset::operator~
    bitset::operator<<=
    bitset::operator>>=
    bitset::operator<<
    bitset::operator>>
    bitset::set
    bitset::reset
    bitset::flip
    Conversions
    Original:
    Conversions
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    bitset::to_string
    bitset::to_ulong
    bitset::to_ullong(C++11)
    Non-Member-Funktionen
    Original:
    Non-member functions
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    operator&
    operator|
    operator^
    operator<<
    operator>>
    Helper-Klassen
    Original:
    Helper classes
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    std::hash(C++11)
     
    <tbody> </tbody>
    bool operator[]( std::size_t pos ) const; constexpr bool operator[]( std::size_t pos ) const;
    		 (1) (bis C + +11)
    (seit C++11)
    reference operator[]( std::size_t pos );
    		 (2)
    Greift auf das Bit an Position pos. Die erste Version gibt den Wert des Bits, gibt die zweite Version ein Objekt vom Typ std::bitset::reference die Änderung des Wertes ermöglicht .
    Original:
    Accesses the bit at position pos. The first version returns the value of the bit, the second version returns an object of type std::bitset::reference that allows modification of the value.
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    Im Gegensatz zu test(), nicht werfen Ausnahmen: das Verhalten ist undefiniert, wenn pos außerhalb der Grenzen .
    Original:
    Unlike test(), does not throw exceptions: the behavior is undefined if pos is out of bounds.
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    Parameter

    pos -
    Position des Bits, um zurückzukehren
    Original:
    position of the bit to return
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    Rückgabewert

    1)

    der Wert des angeforderten Bits
    Original:
    the value of the requested bit
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    2)

    ein Objekt vom Typ std::bitset::reference, die schriftlich an den angeforderten Bit erlaubt .
    Original:
    an object of type std::bitset::reference, which allows writing to the requested bit.
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    Ausnahmen

    Keine
    Original:
    None
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    Beispiel

    #include <iostream>
#include <bitset>

int main()
{
    std::bitset<8> b1(42);
    for (std::size_t i = 0; i < b1.size(); ++i) {
        std::cout << "b1[" << i << "]: " << b1[i] << '\n';
    }
    b1[0] = true; // modifies the first bit through bitset::refence
    std::cout << "After setting bit 0, the bitset holds " << b1 << '\n';
}

    Output: 

    b1[0]: 0
b1[1]: 1
b1[2]: 0
b1[3]: 1
b1[4]: 0
b1[5]: 1
b1[6]: 0
b1[7]: 0
After setting bit 0, bitset is 00101011

    Siehe auch
    greift bestimmtes Bit
    Original:
    accesses specific bit
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    (öffentliche Elementfunktion) [edit]