std::left, std::right, std::internal
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<metanoindex/>
<tbody> </tbody>| Elemento definito nell'header <ios>
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std::ios_base& left( std::ios_base& str ); |
(1) | |
std::ios_base& right( std::ios_base& str ); |
(2) | |
std::ios_base& internal( std::ios_base& str ); |
(3) | |
Modifica il posizionamento di default dei caratteri di riempimento.
left e right si applicano a qualsiasi uscita, internal vale per intero, uscita in virgola mobile, e monetaria. Non ha alcun effetto su ingresso.Original:
Modifies the default positioning of the fill characters.
left and right apply to any output, internal applies to integer, floating-point, and monetary output. Has no effect on input.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
1)
imposta il
adjustfield del str flusso di left come se chiamando str.setf(std::ios_base::left, std::ios_base::adjustfield)Original:
sets the
adjustfield of the stream str to left as if by calling str.setf(std::ios_base::left, std::ios_base::adjustfield)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
2)
imposta il
adjustfield del str flusso di right come se chiamando str.setf(std::ios_base::right, std::ios_base::adjustfield)Original:
sets the
adjustfield of the stream str to right as if by calling str.setf(std::ios_base::right, std::ios_base::adjustfield)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
3)
imposta il
adjustfield del str flusso di internal come se chiamando str.setf(std::ios_base::internal, std::ios_base::adjustfield)Original:
sets the
adjustfield of the stream str to internal as if by calling str.setf(std::ios_base::internal, std::ios_base::adjustfield)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Si tratta di un manipolatore di I / O, può essere chiamato con espressioni quali
out << std::left per qualsiasi out di std::basic_ostream tipo o con un'espressione come in >> std::left 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::left for any out of type std::basic_ostream or with an expression such as in >> std::left for any in of type std::basic_istream.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Parametri
| str | - | riferimento al flusso di I / O
Original: reference to I/O stream 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
str (riferimento al flusso dopo la manipolazione)Original:
str (reference to the stream after manipulation)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Esempio
#include <iostream>
#include <iomanip>
#include <locale>
int main()
{
std::cout.imbue(std::locale("en_US.utf8"));
std::cout << "Left fill:\n" << std::left << std::setfill('*')
<< std::setw(12) << -1.23 << '\n'
<< std::setw(12) << std::hex << std::showbase << 42 << '\n'
<< std::setw(12) << std::put_money(123, true) << "\n\n";
std::cout << "Internal fill:\n" << std::internal
<< std::setw(12) << -1.23 << '\n'
<< std::setw(12) << 42 << '\n'
<< std::setw(12) << std::put_money(123, true) << "\n\n";
std::cout << "Right fill:\n" << std::right
<< std::setw(12) << -1.23 << '\n'
<< std::setw(12) << 42 << '\n'
<< std::setw(12) << std::put_money(123, true) << '\n';
}
Output:
Left fill:
-1.23*******
0x2a********
USD *1.23***
Internal fill:
-*******1.23
0x********2a
USD ****1.23
Right fill:
*******-1.23
********0x2a
***USD *1.23
Vedi anche
modifica la larghezza dell'ingresso successivo / campo di uscita Original: changes the width of the next input/output field The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione) | |
cambia il carattere di riempimento Original: changes the fill character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello) | |