Espacios de nombres
Variantes
Acciones

std::boolalpha, std::noboolalpha

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< cpp‎ | io‎ | manip

 
 
Entrada / salida de la biblioteca
I / O manipuladores
C-estilo I / O
Buffers
Original:
Buffers
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(obsoleto)
Arroyos
Original:
Streams
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Abstracciones
Original:
Abstractions
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File I / O
Original:
File I/O
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Cadena de I / O
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String I/O
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Matriz I / O
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Array I/O
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(obsoleto)
(obsoleto)
(obsoleto)
Tipos
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Types
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Error interfaz categoría
Original:
Error category interface
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(C++11)
 
Entrada / salida manipuladores
De punto flotante de formato
Original:
Floating-point formatting
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Formato Integer
Original:
Integer formatting
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Formato booleano
Original:
Boolean formatting
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boolalphanoboolalpha
Ancho de campo y de control de llenado
Original:
Field width and fill control
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Otros formatos
Original:
Other formatting
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Los espacios en blanco de procesamiento
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Whitespace processing
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Salida de lavado
Original:
Output flushing
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Indicadores de estado manipulación
Original:
Status flags manipulation
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Tiempo y dinero I / O
Original:
Time and money I/O
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(C++11)
(C++11)
(C++11)
(C++11)
 
Definido en la cabecera <ios>
std::ios_base& boolalpha( std::ios_base& str );
(1)
std::ios_base& noboolalpha( std::ios_base& str );
(2)
1)
permite a la bandera boolalpha en el str corriente como si se aplicase 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)
desactiva la bandera boolalpha en el str corriente como si se aplicase 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 es un manipulador de E / S, por lo que puede ser llamado con una expresión como out << std::boolalpha para cualquier out de std::basic_ostream tipo o con una expresión como in >> std::boolalpha para cualquier 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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Contenido

[editar] Parámetros

str -
referencia a la secuencia de E / S
Original:
reference to I/O stream
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[editar] Valor de retorno

str (referencia a la corriente después de la manipulación)
Original:
str (reference to the stream after manipulation)
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[editar] Ejemplo

#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';
}

Salida:

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

[editar] Ver también

Plantilla:cpp/locale/numpunct/dsc do truenamePlantilla:cpp/locale/numpunct/dsc do falsename
borra los indicadores ios_base especificados
Original:
clears the specified ios_base flags
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(función) [editar]
establece los indicadores de ios_base especificados
Original:
sets the specified ios_base flags
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(función) [editar]