Namespace
Varianti

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

Da cppreference.com.
< cpp‎ | io‎ | manip

 
 
Ingresso / libreria di output
I / O manipolatori
C-style I / O
Buffer
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(deprecato)
Streams
Original:
Streams
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Astrazioni
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
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(deprecato)
ostrstream(deprecato)
strstream(deprecato)
Tipi
Original:
Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
Ingresso / uscita manipolatori
Virgola mobile formattazione
Original:
Floating-point formatting
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Formattazione Integer
Original:
Integer formatting
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dec
hex
oct
Formattazione Boolean
Original:
Boolean formatting
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boolalpha
noboolalpha
Larghezza del campo e il controllo di riempimento
Original:
Field width and fill control
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Di formattazione
Original:
Other formatting
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Elaborazione degli spazi vuoti
Original:
Whitespace processing
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Uscita di lavaggio
Original:
Output flushing
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Flag di stato manipolazione
Original:
Status flags manipulation
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Tempo e denaro 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 la base numerica di default per intero di I / O
Original:
Modifies the default numeric base for integer I/O
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1)
imposta il basefield del str flusso di dec come se chiamando 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)
imposta il basefield del str flusso di hex come se chiamando 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)
imposta il basefield del str flusso di oct come se chiamando 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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Si tratta di un manipolatore di I / O, può essere chiamato con espressioni quali out << std::hex per qualsiasi out di std::basic_ostream tipo o con un'espressione come in >> std::hex per qualsiasi in di 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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Indice

[modifica] Parametri

str -
riferimento al flusso di I / O
Original:
reference to I/O stream
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[modifica] Valore di ritorno

str (riferimento al flusso dopo la manipolazione)
Original:
str (reference to the stream after manipulation)
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[modifica] Esempio

#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

[modifica] Vedi anche

modifica la base utilizzata per intero di I / O
Original:
changes the base used for integer I/O
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(funzione) [edit]
controlla se il prefisso è usato per indicare base numerica
Original:
controls whether prefix is used to indicate numeric base
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(funzione) [edit]