std::setbase
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<metanoindex/>
<tbody> </tbody>| definiert in Header <iomanip>
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/*unspecified*/ setbase( int base ); |
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Wenn in einem Ausdruck verwendet
out << setbase(base) oder in >> setbase(base), ändert die basefield Flagge des Stroms out oder in, abhängig vom Wert des base: der Wert 16 Sätze basefield um std::ios_base::hex der Wert 8 Sätze std::ios_base::oct der Wert 10 Sätze 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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Werte
base ausgenommen 8, 10 oder 16 zurückgesetzt basefield auf Null, die Ausgabe dezimal und Präfix-abhängigen Eingangs entspricht .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.
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Parameter
| base | - | neuen Wert für 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. |
Rückgabewert
Gibt ein Objekt vom angegebenen Typ, so dass, wenn
str der Name eines Output-Stream vom Typ ist std::basic_ostream<CharT, Traits> oder std::basic_istream<CharT, Traits>, dann ist der Ausdruck str << setbase(base) oder str >> setbase(base) verhält, als ob der folgende Code ausgeführt wurde: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);
Beispiel
#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';
}
Output:
Parsing string "10 0x10 010"
hexadecimal parse: 16 16 16
prefix-dependent parse: 10 16 8
hex output: 0xa 0x10 0x8
Siehe auch
ändert sich die Basis für die ganze I / O verwendet 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. (Funktion) | |
steuert, ob Präfix verwendet wird, um numerische Basis anzugeben 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. (Funktion) | |
