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std::skipws, std::noskipws

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< cpp‎ | io‎ | manip

 
 
D'entrée / sortie de bibliothèque
I / O manipulateurs
C-style I / O
Tampons
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf (obsolète)
Cours d'eau
Original:
Streams
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Abstractions
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Fichier E / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Chaîne I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Tableau I / O
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Array I/O
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istrstream (obsolète)
ostrstream (obsolète)
strstream (obsolète)
Types
Original:
Types
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streamoff
streamsize
fpos
Interface catégorie d'erreur
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Error category interface
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iostream_category (C++11)
io_errc (C++11)
 
D'entrée / sortie manipulateurs
À virgule flottante en forme
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Floating-point formatting
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Formatage entier
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Integer formatting
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Formatage booléen
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Boolean formatting
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boolalpha
noboolalpha
Largeur de champ et de contrôle de remplissage
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Field width and fill control
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Autre mise en forme
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Other formatting
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Traitement des espaces blancs
Original:
Whitespace processing
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skipws
noskipws
Sortie de rinçage
Original:
Output flushing
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Indicateurs d'état manipulation
Original:
Status flags manipulation
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Temps et d'argent 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>
std::ios_base& skipws( std::ios_base& str );
(1)
std::ios_base& noskipws( std::ios_base& str );
(2)
Active ou désactive le saut de diriger les espaces en utilisant les fonctions d'entrée formatées (activé par défaut). N'a pas d'effet sur la production .
Original:
Enables or disables skipping of leading whitespace by the formatted input functions (enabled by default). Has no effect on output.
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1)
permet le drapeau skipws dans le flux str comme si en appelant str.setf(std::ios_base::skipws)
Original:
enables the skipws flag in the stream str as if by calling str.setf(std::ios_base::skipws)
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2)
désactive le drapeau skipws dans le flux str comme si en appelant str.unsetf(std::ios_base::skipws)
Original:
disables the skipws flag in the stream str as if by calling str.unsetf(std::ios_base::skipws)
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L'espace blanc à sauter est effectuée par le constructeur de std::basic_istream::sentry, qui se lit et annule les caractères classés comme espaces en utilisant la facette de std::ctype locale imprégnée du cours d'eau .
Original:
The whitespace skipping is performed by the constructor of std::basic_istream::sentry, which reads and discards the characters classified as whitespace by the std::ctype facet of the stream's imbued locale.
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Il s'agit d'un manipulateur d'E / S, il peut être appelé avec une expression telle que pour tout out << std::noskipws out de std::basic_ostream type ou d'une expression telle que pour tout in >> std::noskipws in de std::basic_istream type .
Original:
This is an I/O manipulator, it may be called with an expression such as out << std::noskipws for any out of type std::basic_ostream or with an expression such as in >> std::noskipws for any in of type std::basic_istream.
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Sommaire

[modifier] Paramètres

str -
référence aux flux d'entrée / sortie
Original:
reference to I/O stream
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[modifier] Retourne la valeur

str (référence au flux après la manipulation)
Original:
str (reference to the stream after manipulation)
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[modifier] Exemple

#include <iostream>
#include <sstream>
int main()
{
    char c1, c2, c3;
    std::istringstream("a b c") >> c1 >> c2 >> c3;
    std::cout << "Default  behavior: c1 = " << c1 << " c2 = " << c2 << " c3 = " << c3 << '\n';
    std::istringstream("a b c") >> std::noskipws >> c1 >> c2 >> c3;
    std::cout << "noskipws behavior: c1 = " << c1 << " c2 = " << c2 << " c3 = " << c3 << '\n';
}

Résultat :

Default  behavior: c1 = a c2 = b c3 = c
noskipws behavior: c1 = a c2 =   c3 = b

[modifier] Voir aussi

efface les drapeaux ios_base spécifiées
Original:
clears the specified ios_base flags
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(fonction) [edit]
fixe les drapeaux ios_base spécifiées
Original:
sets the specified ios_base flags
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(fonction) [edit]