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std::left, std::right, std::internal

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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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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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internal
left
right
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)
std::ios_base& internal( std::ios_base& str );
(3)
Ändert die Standard-Positionierung der Füllzeichen. left und right auf jeden Ausgang gelten, gilt internal auf Integer, Gleitkomma-und Währungsunion ausgegeben. Hat keine Auswirkung auf Eingang .
Original:
Modifies the default positioning of the fill characters. left and right apply to any output, internal applies to integer, floating-point, and monetary output. Has no effect on input.
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1)
setzt die adjustfield des Baches str um left, als ob durch den Aufruf str.setf(std::ios_base::left, std::ios_base::adjustfield)
Original:
sets the adjustfield of the stream str to left as if by calling str.setf(std::ios_base::left, std::ios_base::adjustfield)
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2)
setzt die adjustfield des Baches str um right, als ob durch den Aufruf str.setf(std::ios_base::right, std::ios_base::adjustfield)
Original:
sets the adjustfield of the stream str to right as if by calling str.setf(std::ios_base::right, std::ios_base::adjustfield)
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3)
setzt die adjustfield des Baches str um internal, als ob durch den Aufruf str.setf(std::ios_base::internal, std::ios_base::adjustfield)
Original:
sets the adjustfield of the stream str to internal as if by calling str.setf(std::ios_base::internal, std::ios_base::adjustfield)
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Dies ist ein I / O-Manipulators, kann es mit einem Expressionsvektor wie out << std::left für jede out vom Typ std::basic_ostream oder mit einem Expressionsvektor wie in >> std::left 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::left for any out of type std::basic_ostream or with an expression such as in >> std::left 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 <iomanip>
#include <locale>
int main()
{
    std::cout.imbue(std::locale("en_US.utf8"));
    std::cout << "Left fill:\n" << std::left << std::setfill('*')
              << std::setw(12) << -1.23  << '\n'
              << std::setw(12) << std::hex << std::showbase << 42 << '\n'
              << std::setw(12) << std::put_money(123, true) << "\n\n";
 
    std::cout << "Internal fill:\n" << std::internal
              << std::setw(12) << -1.23  << '\n'
              << std::setw(12) << 42 << '\n'
              << std::setw(12) << std::put_money(123, true) << "\n\n";
 
    std::cout << "Right fill:\n" << std::right
              << std::setw(12) << -1.23  << '\n'
              << std::setw(12) << 42 << '\n'
              << std::setw(12) << std::put_money(123, true) << '\n';
}

Output:

Left fill:
-1.23*******
0x2a********
USD *1.23***
 
Internal fill:
-*******1.23
0x********2a
USD ****1.23
 
Right fill:
*******-1.23
********0x2a
***USD *1.23

[Bearbeiten] Siehe auch

ändert sich die Breite des nächsten Eingangs / Ausgangs-Feldes
Original:
changes the width of the next input/output field
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(Funktion) [edit]
ändert sich die Füllzeichen
Original:
changes the fill character
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(Funktions-Template) [edit]