std::setbase
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<metanoindex/>
<tbody> </tbody>| Déclaré dans l'en-tête <iomanip>
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/*unspecified*/ setbase( int base ); |
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Lorsqu'ils sont utilisés dans une expression ou
out << setbase(base) in >> setbase(base), change le drapeau basefield du courant out ou in, en fonction de la valeur de base: la valeur 16 ensembles basefield à std::ios_base::hex, la valeur 8 ensembles std::ios_base::oct, la valeur 10 ensembles 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.The text has been machine-translated via Google Translate.
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Les valeurs de
base autre que 8, 10, ou 16 basefield remis à zéro, ce qui correspond à la sortie décimal et le préfixe dépendante d'entrée .Original:
Values of
base other than 8, 10, or 16 reset basefield to zero, which corresponds to decimal output and prefix-dependent input.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
| base | - | nouvelle valeur pour 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. |
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 << setbase(base) ou str >> setbase(base) 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 << setbase(base) or str >> setbase(base) 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.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);
Exemple
#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';
}
Résultat :
Parsing string "10 0x10 010"
hexadecimal parse: 16 16 16
prefix-dependent parse: 10 16 8
hex output: 0xa 0x10 0x8
Voir aussi
modifie la base utilisée pour l'entier 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. (fonction) | |
contrôle si le préfixe est utilisé pour indiquer base numérique 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. (fonction) | |