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    std::basic_istream::getline

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    <metanoindex/>

     
    C++
     
    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)
     
    std::basic_istream
    Globale Objekte
    Original:
    Global objects
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    cin
    wcin
    Member-Funktionen
    Original:
    Member functions
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    basic_istream::basic_istream
    basic_istream::~basic_istream
    basic_istream::operator=(C++11)
    Formatierte Eingabe
    Original:
    Formatted input
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    basic_istream::operator>>
    Unformatierte Eingabe
    Original:
    Unformatted input
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    basic_istream::get
    basic_istream::peek
    basic_istream::unget
    basic_istream::putback
    basic_istream::getline
    basic_istream::ignore
    basic_istream::read
    basic_istream::readsome
    basic_istream::gcount
    Positionierung
    Original:
    Positioning
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    basic_istream::tellg
    basic_istream::seekg
    Verschiedenes
    Original:
    Miscellaneous
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    basic_istream::sync
    basic_istream::swap(C++11)
    Mitglied Klassen
    Original:
    Member classes
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    basic_istream::sentry
    Non-Member-Funktionen
    Original:
    Non-member functions
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    operator>>(std::basic_istream)
     
    <tbody> </tbody>
    basic_istream& getline( char_type* s, std::streamsize count );
    		 (1)
    basic_istream& getline( char_type* s, std::streamsize count, char_type delim );
    		 (2)

    1)

    Auszüge Zeichen von stream, bis zum Ende der Zeile (entspricht getline(s, count, widen(’\n’)))
    Original:
    Extracts characters from stream until the end of line (equivalent to getline(s, count, widen(’\n’)))
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    2)

    Auszüge Zeichen von stream bis zum angegebenen Trennzeichen .
    Original:
    Extracts characters from stream until the specified delimiter.
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    Verhält sich wie UnformattedInputFunction. Nach dem Bau und Prüfung der Schildwache Objekts, extrahiert Zeichen aus *this und lagerte sie in aufeinanderfolgenden Stellen des Arrays, deren erstes Element wird durch s hingewiesen, bis eine der folgenden Situationen eintritt: (getestet in der angegebenen Reihenfolge)
    Original:
    Behaves as UnformattedInputFunction. After constructing and checking the sentry object, extracts characters from *this and stored them in successive locations of the array whose first element is pointed to by s until any of the following occurs: (tested in the order shown)
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    • Ende der Datei auftritt in der Eingabesequenz (in welchem ​​Fall setstate(eofbit) ausgeführt wird)
      Original:
      end of file condition occurs in the input sequence (in which case setstate(eofbit) is executed)
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    • die nächste verfügbare Zeichen c ist das Trennzeichen, wie Traits::eq(c, delim) bestimmt. Der Begrenzer wird extrahiert (anders basic_istream::get()) und gezählt Richtung gcount(), aber nicht gespeichert .
      Original:
      the next available character c is the delimiter, as determined by Traits::eq(c, delim). The delimiter is extracted (unlike basic_istream::get()) and counted towards gcount(), but is not stored.
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    • count-1 Zeichen extrahiert worden sind (in diesem Fall ausgeführt wird setstate(failbit)) .
      Original:
      count-1 characters have been extracted (in which case setstate(failbit) is executed).
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    Wenn die Funktion extrahiert keine Zeichen (zB wenn count < 1), setstate(failbit) ausgeführt wird .
    Original:
    If the function extracts no characters (e.g. if count < 1), setstate(failbit) is executed.
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    In jedem Fall, wenn count>0 es speichert dann ein Nullzeichen CharT() in den nächsten nachfolgenden Standort des Arrays und Updates gcount() .
    Original:
    In any case, if count>0, it then stores a null character CharT() into the next successive location of the array and updates gcount().
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    Notes

    Weil Bedingung Nr. 2 wird getestet, bevor Bedingung # 3, der Eingang Linie, die genau der Puffer, gegen keine failbit .
    Original:
    Because condition #2 is tested before condition #3, the input line that exactly fits the buffer, does not trigger failbit.
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    Da die abschließende Zeichen als extrahierte Zeichen gezählt wird, kommt leere Eingabezeile nicht auslösen failbit .
    Original:
    Because the terminating character is counted as extracted character, empty input line does not trigger failbit.
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    Parameter

    s -
    Zeiger auf die Zeichenkette, um die Zeichen zu speichern
    Original:
    pointer to the character string to store the characters to
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    count -
    Größe der Zeichenfolge, auf die s
    Original:
    size of character string pointed to by s
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    delim -
    Trennzeichen, um die Extraktion bei stoppen. Es wird extrahiert, aber nicht gespeichert .
    Original:
    delimiting character to stop the extraction at. It is extracted but not stored.
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    Rückgabewert

    *this

    Beispiel

    #include <iostream>
#include <sstream>
#include <vector>
#include <array>

int main()
{
    std::istringstream input("abc|def|gh");
    std::vector<std::array<char, 4>> v;

    for(std::array<char, 4> a; input.getline(&a[0], 4, '|'); ) {
        v.push_back(a);
    }

    for(auto& a : v) {
        std::cout << &a[0] << '\n';
    }
}

    Output: 

    abc
def
gh

    Siehe auch

    }
    Lesedaten von einem I / O-Strom in einen String
    Original:
    read data from an I/O stream into a string
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    (Funktion)
    Extrakte formatierte Daten
    Original:
    extracts formatted data
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    (öffentliche Elementfunktion) [edit]
    		Extrahiere Zeichen
    (öffentliche Elementfunktion) [edit]
    extrahiert Blöcken von Zeichen
    Original:
    extracts blocks of characters
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    (öffentliche Elementfunktion) [edit]