std::boolalpha, std::noboolalpha
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<metanoindex/>
<tbody> </tbody>| Definido no cabeçalho <ios>
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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)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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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)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
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.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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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)The text has been machine-translated via Google Translate.
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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 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) | |
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) |