Espaces de noms
Variantes
Affichages
Actions

std::showbase, std::noshowbase

De cppreference.com
< cpp‎ | io‎ | manip

 
 
D'entrée / sortie de bibliothèque
I / O manipulateurs
C-style I / O
Tampons
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 (obsolète)
Cours d'eau
Original:
Streams
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Abstractions
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
Fichier E / 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
Chaîne 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
Tableau 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 (obsolète)
ostrstream (obsolète)
strstream (obsolète)
Types
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
Interface catégorie d'erreur
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)
 
D'entrée / sortie manipulateurs
À virgule flottante en forme
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.
Formatage entier
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
Formatage booléen
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
Largeur de champ et de contrôle de remplissage
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.
Autre mise en forme
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.
Traitement des espaces blancs
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.
Sortie de rinçage
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.
Indicateurs d'état manipulation
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.
Temps et d'argent 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)
 
Defined in header <ios>
std::ios_base& showbase( std::ios_base& str );
(1)
std::ios_base& noshowbase( std::ios_base& str );
(2)
1)
permet le drapeau showbase dans le flux str comme si en appelant str.setf(std::ios_base::showbase)
Original:
enables the showbase flag in the stream str as if by calling str.setf(std::ios_base::showbase)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
2)
désactive le drapeau showbase dans le flux str comme si en appelant str.unsetf(std::ios_base::showbase)
Original:
disables the showbase flag in the stream str as if by calling str.unsetf(std::ios_base::showbase)
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Il s'agit d'un manipulateur d'E / S, il peut être appelé avec une expression telle que pour tout out << std::showbase out de std::basic_ostream type ou d'une expression telle que pour tout in >> std::showbase in de std::basic_istream type .
Original:
This is an I/O manipulator, it may be called with an expression such as out << std::showbase for any out of type std::basic_ostream or with an expression such as in >> std::showbase 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.

Sommaire

[modifier] Paramètres

str -
référence aux flux d'entrée / sortie
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.

[modifier] Retourne la valeur

str (référence au flux après la manipulation)
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.

[modifier] Exemple

#include <sstream>
#include <locale>
#include <iostream>
#include <iomanip>
int main()
{
    // showbase affects the output of octals and hexadecimals
    std::cout << std::hex
              << "showbase: " << std::showbase << 42 << '\n'
              << "noshowbase: " << std::noshowbase << 42 << '\n';
 
    // and both input and output of monetary values
    std::locale::global(std::locale("en_US.utf8"));
    long double val = 0;
    std::istringstream is("3.14");
    is >> std::showbase >> std::get_money(val);
    std::cout << "With showbase, parsing 3.14 as money gives " << val << '\n';
    is.seekg(0);
    is >> std::noshowbase >> std::get_money(val);
    std::cout << "Without showbase, parsing 3.14 as money gives " << val << '\n';
}

Résultat :

showbase: 0x2a
noshowbase: 2a
With showbase, parsing 3.14 as money gives 0
Without showbase, parsing 3.14 as money gives 314

[modifier] Voir aussi

efface les drapeaux ios_base spécifiées
Original:
clears the specified ios_base flags
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(fonction) [edit]
fixe les drapeaux ios_base spécifiées
Original:
sets the specified ios_base flags
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(fonction) [edit]