std::setw
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<metanoindex/>
<tbody> </tbody>| Déclaré dans l'en-tête <iomanip>
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/*unspecified*/ setw( int n ); |
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Lorsqu'il est utilisé dans une expression
out << setw(n) ou in >> setw(n), définit le paramètre width du flux out ou in exactement n. Cette valeur n'est pas "collant": la prochaine entrée ou de la sortie qui est affectée par la valeur du champ width du ruisseau, il réinitialise à zéro (ce qui signifie "non spécifié") .Original:
When used in an expression
out << setw(n) or in >> setw(n), sets the width parameter of the stream out or in to exactly n. This value is not "sticky": the next input or output operation that is affected by the value of the stream's width field, resets it to zero (meaning "unspecified").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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Paramètres
| n | - | nouvelle valeur pour la largeur
Original: new value for width The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Retourne la valeur
Retourne un objet de type non précisé de sorte que si
str est le nom d'un flux de sortie de type std::basic_ostream<CharT, Traits> ou std::basic_istream<CharT, Traits>, alors l'expression str << setw(n) ou str >> setw(n) se comporte comme si le code suivant est exécuté: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 << setw(n) or str >> setw(n) behaves as if the following code was executed: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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str.width(n);
Exemple
#include <sstream>
#include <iostream>
#include <iomanip>
int main()
{
std::cout << "no setw: " << 42 << '\n'
<< "setw(6): " << std::setw(6) << 42 << '\n';
std::istringstream is("hello, world");
char arr[10];
is >> std::setw(6) >> arr;
std::cout << "Input from \"" << is.str() << "\" with setw(6) gave \"" << arr << "\"\n";
}
Résultat :
no setw: 42
setw(6): 42
Input from "hello, world" with setw(6) gave "hello"
Voir aussi
| manages field width (fonction membre publique de std::ios_base)
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modifie le caractère de remplissage 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. (fonction générique) | |