std::setbase

 

C++

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Espressioni regolari (C++11)

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Ingresso / libreria di output

I / O manipolatori

C-style I / O

Buffer Original: Buffers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (deprecato)

Streams Original: Streams The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Astrazioni Original: Abstractions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

File I / O Original: File I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_ifstream

basic_ofstream

basic_fstream

String I / O Original: String I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istringstream

basic_ostringstream

basic_stringstream

Array I / O Original: Array I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

istrstream (deprecato)

ostrstream (deprecato)

strstream (deprecato)

Tipi Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

streamoff

streamsize

fpos

Errore categoria interfaccia Original: Error category interface The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iostream_category (C++11)

io_errc (C++11)

 

Ingresso / uscita manipolatori

Virgola mobile formattazione Original: Floating-point formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
showpoint noshowpoint setprecision	fixed scientific hexfloat defaultfloat (C++11) (C++11)
Formattazione Integer Original: Integer formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
setbase showbase noshowbase	dec hex oct
Formattazione Boolean Original: Boolean formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
boolalpha noboolalpha
Larghezza del campo e il controllo di riempimento Original: Field width and fill control The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
setfill setw	internal left right
Di formattazione Original: Other formatting The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
showpos noshowpos	uppercase nouppercase
Elaborazione degli spazi vuoti Original: Whitespace processing The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ws ends	skipws noskipws
Uscita di lavaggio Original: Output flushing The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
flush endl	unitbuf nounitbuf
Flag di stato manipolazione Original: Status flags manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
resetiosflags	setiosflags
Tempo e denaro I / O Original: Time and money I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
get_money (C++11) get_time (C++11)	put_money (C++11) put_time (C++11)

 

Elemento definito nell'header <iomanip>
/*unspecified*/ setbase( int base );

Quando utilizzato in un'espressione out << setbase(base) o in >> setbase(base), cambia il flag basefield del flusso out in o, a seconda del valore della base: il valore 16 insiemi basefield al std::ios_base::hex, il valore 8 insiemi std::ios_base::oct, il valore 10 serie std::ios_base::dec.

Original:

When used in an expression out << setbase(base) or in >> setbase(base), changes the basefield flag of the stream out or in, depending on the value of base: the value 16 sets basefield to std::ios_base::hex, the value 8 sets std::ios_base::oct, the value 10 sets std::ios_base::dec.

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Valori di base diverso da 8, 10, o 16 basefield azzeramento, che corrisponde all'uscita decimale e prefisso-dipendente ingresso.

Original:

Values of base other than 8, 10, or 16 reset basefield to zero, which corresponds to decimal output and prefix-dependent input.

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Parametri

base

-

nuovo valore per basefield Original: new value for basefield The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

Restituisce un oggetto di tipo non specificato tale che se str è il nome di un flusso di output di tipo std::basic_ostream<CharT, Traits> o std::basic_istream<CharT, Traits>, allora l'espressione str << setbase(base) str >> setbase(base) o si comporta come se il codice riportato di seguito è stato eseguito:

Original:

Returns an object of unspecified type such that if str is the name of an output stream of type std::basic_ostream<CharT, Traits> or std::basic_istream<CharT, Traits>, then the expression str << setbase(base) or str >> setbase(base) behaves as if the following code was executed:

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str.setf(base ==  8 ? std::ios_base::oct :
            base == 10 ? std::ios_base::dec :
                base == 16 ? std::ios_base::hex :
                     std::ios_base::fmtflags(0),
         std::ios_base::basefield);

Esempio

#include <iostream>
#include <sstream>
#include <iomanip>
int main()
{
    std::cout << "Parsing string \"10 0x10 010\"\n";
 
    int n1, n2, n3;
    std::istringstream s("10 0x10 010");
    s >> std::setbase(16) >> n1 >> n2 >> n3;
    std::cout << "hexadecimal parse: " << n1 << ' ' << n2 << ' ' << n3 << '\n';
 
    s.clear();
    s.seekg(0);
    s >> std::setbase(0) >> n1 >> n2 >> n3;
    std::cout << "prefix-dependent parse: " << n1 << ' ' << n2 << ' ' << n3 << '\n';
 
    std::cout << "hex output: " << std::setbase(16)
              << std::showbase << n1 << ' ' << n2 << ' ' << n3 << '\n';
}

Output:

Parsing string "10 0x10 010"
hexadecimal parse: 16 16 16
prefix-dependent parse: 10 16 8
hex output: 0xa 0x10 0x8

Vedi anche

dec hex oct	modifica la base utilizzata per intero di I / O Original: changes the base used for integer I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
showbase noshowbase	controlla se il prefisso è usato per indicare base numerica Original: controls whether prefix is used to indicate numeric base The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)