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std::dec, std::hex, std::oct

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< cpp‎ | io‎ | manip

 
 
Input / Output-Bibliothek
I / O-Manipulatoren
C-style I / O
Puffern
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(veraltet)
Streams
Original:
Streams
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Abstraktionen
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Datei-I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(veraltet)
ostrstream(veraltet)
strstream(veraltet)
Types
Original:
Types
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streamoff
streamsize
fpos
Fehler Kategorie Schnittstelle
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
Eingang / Ausgang Manipulatoren
Gleitkomma-Formatierung
Original:
Floating-point formatting
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Integer-Formatierung
Original:
Integer formatting
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dec
hex
oct
Boolean Formatierung
Original:
Boolean formatting
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boolalpha
noboolalpha
Feldbreite und fill Kontrolle
Original:
Field width and fill control
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Andere Formatierungen
Original:
Other formatting
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Whitespace-Verarbeitung
Original:
Whitespace processing
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Output Spülung
Original:
Output flushing
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Statusflags Manipulation
Original:
Status flags manipulation
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Zeit und Geld 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>
(1)
(2)
(3)
Ändert die standardmäßige numerische Basis für Integer-I / O
Original:
Modifies the default numeric base for integer I/O
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1)
setzt die basefield des Baches str um dec, als ob durch den Aufruf str.setf(std::ios_base::dec, std::ios_base::basefield)
Original:
sets the basefield of the stream str to dec as if by calling str.setf(std::ios_base::dec, std::ios_base::basefield)
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2)
setzt die basefield des Baches str um hex, als ob durch den Aufruf str.setf(std::ios_base::hex, std::ios_base::basefield)
Original:
sets the basefield of the stream str to hex as if by calling str.setf(std::ios_base::hex, std::ios_base::basefield)
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3)
setzt die basefield des Baches str um oct, als ob durch den Aufruf str.setf(std::ios_base::oct, std::ios_base::basefield)
Original:
sets the basefield of the stream str to oct as if by calling str.setf(std::ios_base::oct, std::ios_base::basefield)
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Dies ist ein I / O-Manipulators, kann es mit einem Expressionsvektor wie out << std::hex für jede out vom Typ std::basic_ostream oder mit einem Expressionsvektor wie in >> std::hex für jede in vom Typ std::basic_istream aufgerufen werden .
Original:
This is an I/O manipulator, it may be called with an expression such as out << std::hex for any out of type std::basic_ostream or with an expression such as in >> std::hex for any in of type std::basic_istream.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

str -
Verweisen auf I / O-Strom
Original:
reference to I/O stream
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[Bearbeiten] Rückgabewert

str (Verweis auf den Stream nach Manipulation)
Original:
str (reference to the stream after manipulation)
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[Bearbeiten] Beispiel

#include <iostream>
#include <sstream>
int main()
{
    std::cout << "The number 42 in octal:   " << std::oct << 42 << '\n'
              << "The number 42 in decimal: " << std::dec << 42 << '\n'
              << "The number 42 in hex:     " << std::hex << 42 << '\n';
    int n;
    std::istringstream("2A") >> std::hex >> n;
    std::cout << std::dec << "Parsing \"2A\" as hex gives " << n << '\n';
}

Output:

The number 42 in octal:   52
The number 42 in decimal: 42
The number 42 in hex:     2a
Parsing "2A" as hex gives 42

[Bearbeiten] Siehe auch

ändert sich die Basis für die ganze I / O verwendet
Original:
changes the base used for integer I/O
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(Funktion) [edit]
steuert, ob Präfix verwendet wird, um numerische Basis anzugeben
Original:
controls whether prefix is used to indicate numeric base
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(Funktion) [edit]