std::boolalpha, std::noboolalpha

 

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I / O manipuladores

C estilo de I / O

Buffers Original: Buffers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (obsoleta)

Streams Original: Streams The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Abstrações Original: Abstractions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base

basic_ios

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File I / O Original: File I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_ifstream

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Cordas I / O Original: String I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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Matriz de I / O Original: Array I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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Entrada / saída manipuladores

De ponto flutuante de formatação Original: Floating-point formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
showpointnoshowpoint setprecision	fixedscientifichexfloatdefaultfloat (C++11)(C++11)
Formatação inteiro Original: Integer formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
setbase showbasenoshowbase	dechexoct
Formatação booleana Original: Boolean formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
boolalphanoboolalpha
Largura do campo e controle de preenchimento Original: Field width and fill control The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
setfill setw	internalleftright
Outra formatação Original: Other formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
showposnoshowpos	uppercasenouppercase
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ws ends	skipwsnoskipws
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flush endl	unitbufnounitbuf
Sinalizadores de status manipulação Original: Status flags manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
resetiosflags	setiosflags
Tempo e dinheiro I / O Original: Time and money I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
get_money (C++11) get_time (C++11)	put_money (C++11) put_time (C++11)

 

Definido no cabeçalho <ios>
std::ios_base& boolalpha( std::ios_base& str );	(1)
std::ios_base& noboolalpha( std::ios_base& str );	(2)

1)

permite a bandeira boolalpha no str fluxo, como se chamando 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)

desabilita a bandeira boolalpha no str fluxo, como se chamando 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 é um manipulador de I / O, por isso pode ser chamado com uma expressão como out << std::boolalpha para qualquer out de std::basic_ostream tipo ou com uma expressão como in >> std::boolalpha para qualquer tipo de in 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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Parâmetros

str

-

referência ao fluxo de E / S Original: reference to I/O stream The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valor de retorno

str (referência ao fluxo após a manipulação)

Original:

str (reference to the stream after manipulation)

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Exemplo

#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';
}

Saída:

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

Veja também

Predefinição:cpp/locale/numpunct/dsc do truenamePredefinição:cpp/locale/numpunct/dsc do falsename

resetiosflags	limpa os sinalizadores ios_base especificados Original: clears the specified ios_base flags The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função)
setiosflags	define os sinalizadores ios_base especificados Original: sets the specified ios_base flags The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função)