Espaços nominais
Variantes
Acções

std::dec, std::hex, std::oct

Da cppreference.com
< 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
Original:
Streams
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Abstrações
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
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
Original:
Types
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streamoff
streamsize
fpos
Interface de categoria de erro
Original:
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
Original:
Integer formatting
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dec
hex
oct
Formatação booleana
Original:
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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Espaços de processamento
Original:
Whitespace processing
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Saída de descarga
Original:
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>
(1)
(2)
(3)
Modifica a base padrão numérico para o inteiro I / O
Original:
Modifies the default numeric base for integer I/O
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1)
define o basefield do str fluxo para dec como se ligando str.setf(std::ios_base::dec, std::ios_base::basefield)
Original:
sets the basefield of the stream str to dec as if by calling str.setf(std::ios_base::dec, std::ios_base::basefield)
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2)
define o basefield do str fluxo para hex como se ligando str.setf(std::ios_base::hex, std::ios_base::basefield)
Original:
sets the basefield of the stream str to hex as if by calling str.setf(std::ios_base::hex, std::ios_base::basefield)
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3)
define o basefield do str fluxo para oct como se ligando str.setf(std::ios_base::oct, std::ios_base::basefield)
Original:
sets the basefield of the stream str to oct as if by calling str.setf(std::ios_base::oct, std::ios_base::basefield)
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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::hex out de std::basic_ostream tipo ou com uma indicação tal como para qualquer in >> std::hex in de std::basic_istream tipo.
Original:
This is an I/O manipulator, it may be called with an expression such as out << std::hex for any out of type std::basic_ostream or with an expression such as in >> std::hex 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>
#include <sstream>
int main()
{
    std::cout << "The number 42 in octal:   " << std::oct << 42 << '\n'
              << "The number 42 in decimal: " << std::dec << 42 << '\n'
              << "The number 42 in hex:     " << std::hex << 42 << '\n';
    int n;
    std::istringstream("2A") >> std::hex >> n;
    std::cout << std::dec << "Parsing \"2A\" as hex gives " << n << '\n';
}

Output:

The number 42 in octal:   52
The number 42 in decimal: 42
The number 42 in hex:     2a
Parsing "2A" as hex gives 42

[editar] Veja também

muda a base utilizada para o inteiro I / O
Original:
changes the base used for integer I/O
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(função) [edit]
controla se o prefixo é usado para indicar base numérica
Original:
controls whether prefix is used to indicate numeric base
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(função) [edit]