Namespace
Varianti

std::boolalpha, std::noboolalpha

Da cppreference.com.
< cpp‎ | io‎ | manip

 
 
Ingresso / libreria di output
I / O manipolatori
C-style I / O
Buffer
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(deprecato)
Streams
Original:
Streams
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Astrazioni
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(deprecato)
ostrstream(deprecato)
strstream(deprecato)
Tipi
Original:
Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
Ingresso / uscita manipolatori
Virgola mobile formattazione
Original:
Floating-point formatting
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Formattazione Integer
Original:
Integer formatting
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Formattazione Boolean
Original:
Boolean formatting
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boolalpha
noboolalpha
Larghezza del campo e il controllo di riempimento
Original:
Field width and fill control
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Di formattazione
Original:
Other formatting
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Elaborazione degli spazi vuoti
Original:
Whitespace processing
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Uscita di lavaggio
Original:
Output flushing
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Flag di stato manipolazione
Original:
Status flags manipulation
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Tempo e denaro I / O
Original:
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)
 
Defined in header <ios>
std::ios_base& boolalpha( std::ios_base& str );
(1)
std::ios_base& noboolalpha( std::ios_base& str );
(2)
1)
consente la bandiera boolalpha nel str flusso come se chiamando str.setf(std::ios_base::boolalpha)
Original:
enables the boolalpha flag in the stream str as if by calling str.setf(std::ios_base::boolalpha)
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2)
disabilita la bandiera boolalpha nel str flusso come se chiamando str.unsetf(std::ios_base::boolalpha)
Original:
disables the boolalpha flag in the stream str as if by calling str.unsetf(std::ios_base::boolalpha)
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std::boolalpha è un manipolatore di I / O, in modo che può essere chiamato con espressioni quali out << std::boolalpha per qualsiasi out di std::basic_ostream tipo o con un'espressione come in >> std::boolalpha per qualsiasi in di tipo std::basic_istream.
Original:
std::boolalpha is an I/O manipulator, so it may be called with an expression such as out << std::boolalpha for any out of type std::basic_ostream or with an expression such as in >> std::boolalpha for any in of type std::basic_istream.
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Indice

[modifica] Parametri

str -
riferimento al flusso di I / O
Original:
reference to I/O stream
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[modifica] Valore di ritorno

str (riferimento al flusso dopo la manipolazione)
Original:
str (reference to the stream after manipulation)
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[modifica] Esempio

#include <sstream>
#include <locale>
#include <iostream>
int main()
{
    // boolalpha output
    std::cout << std::boolalpha 
              << "boolalpha true: " << true << '\n'
              << "boolalpha false: " << false << '\n';
    std::cout << std::noboolalpha 
              << "noboolalpha true: " << true << '\n'
              << "noboolalpha false: " << false << '\n';
    // booalpha parse
    bool b1, b2;
    std::istringstream is("true false");
    is >> std::boolalpha >> b1 >> b2;
    std::cout << '\"' << is.str() << "\" parsed as " << b1 << ' ' << b2 << '\n';
}

Output:

boolalpha true: true
boolalpha false: false
noboolalpha true: 1
noboolalpha false: 0
"true false" parsed as 1 0

[modifica] Vedi anche

Template:cpp/locale/numpunct/dsc do truenameTemplate:cpp/locale/numpunct/dsc do falsename
cancella le bandiere ios_base specificati
Original:
clears the specified ios_base flags
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(funzione) [edit]
imposta i flag ios_base specificati
Original:
sets the specified ios_base flags
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(funzione) [edit]