Espaços nominais
Variantes
Acções

std::showpos, std::noshowpos

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< cpp‎ | io‎ | manip

 
 
De entrada / saída da biblioteca
I / O manipuladores
C estilo de I / O
Buffers
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleta)
Streams
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Streams
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Abstrações
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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
Cordas I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Matriz de I / O
Original:
Array I/O
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istrstream(obsoleta)
ostrstream(obsoleta)
strstream(obsoleta)
Tipos
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Types
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streamoff
streamsize
fpos
Interface de categoria de erro
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Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
Entrada / saída manipuladores
De ponto flutuante de formatação
Original:
Floating-point formatting
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Formatação inteiro
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Integer formatting
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Formatação booleana
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Boolean formatting
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boolalpha
noboolalpha
Largura do campo e controle de preenchimento
Original:
Field width and fill control
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Outra formatação
Original:
Other formatting
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showpos
noshowpos
Espaços de processamento
Original:
Whitespace processing
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Saída de descarga
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Output flushing
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Sinalizadores de status manipulação
Original:
Status flags manipulation
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Tempo e dinheiro 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& showpos( std::ios_base& str );
(1)
std::ios_base& noshowpos( std::ios_base& str );
(2)
Ativa ou desativa a exibição da '+' sinal de mais em não-negativo de saída inteiro. Não tem efeito sobre entrada.
Original:
Enables or disables the display of the plus sign '+' in non-negative integer output. Has no effect on input.
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1)
permite a bandeira showpos no str fluxo, como se chamando str.setf(std::ios_base::showpos)
Original:
enables the showpos flag in the stream str as if by calling str.setf(std::ios_base::showpos)
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2)
desabilita a bandeira showpos no str fluxo, como se chamando str.unsetf(std::ios_base::showpos)
Original:
disables the showpos flag in the stream str as if by calling str.unsetf(std::ios_base::showpos)
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Trata-se de um manipulador de I / O, que pode ser chamada com uma indicação tal como para qualquer out << std::showpos out de std::basic_ostream tipo ou com uma indicação tal como para qualquer in >> std::showpos in de std::basic_istream tipo.
Original:
This is an I/O manipulator, it may be called with an expression such as out << std::showpos for any out of type std::basic_ostream or with an expression such as in >> std::showpos for any in of type std::basic_istream.
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Índice

[editar] Parâmetros

str -
referência ao fluxo de E / S
Original:
reference to I/O stream
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[editar] Valor de retorno

str (referência ao fluxo após a manipulação)
Original:
str (reference to the stream after manipulation)
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[editar] Exemplo

#include <iostream>
int main()
{
        std::cout << "showpos: " << std::showpos << 42 << ' ' << 3.14 << ' ' << 0 << '\n'
                  << "noshowpos: " << std::noshowpos << 42 << ' ' << 3.14 << ' ' << 0 << '\n';
}

Output:

showpos: +42 +3.14 +0
noshowpos: 42 3.14 0

[editar] Veja também

limpa os sinalizadores ios_base especificados
Original:
clears the specified ios_base flags
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(função) [edit]
define os sinalizadores ios_base especificados
Original:
sets the specified ios_base flags
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(função) [edit]