std::setbase
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definiert in Header <iomanip> | ||
/*unspecified*/ setbase(int base ); | ||
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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Inhaltsverzeichnis |
[Bearbeiten]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. |
[Bearbeiten]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.
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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);
[Bearbeiten]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
[Bearbeiten]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) | |
