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std::getline – cppreference.com

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definiert in Header

<string>

template< class CharT, class Traits, class Allocator > std::basic_istream<CharT,Traits>& getline( std::basic_istream<CharT,Traits>& input, std::basic_string<CharT,Traits,Allocator>& str, CharT delim );

 (1)

template< class CharT, class Traits, class Allocator > std::basic_istream<CharT,Traits>& getline( std::basic_istream<CharT,Traits>&& input, std::basic_string<CharT,Traits,Allocator>& str, CharT delim );

 (1) (seit C++11)

template< class CharT, class Traits, class Allocator > std::basic_istream<CharT,Traits>& getline( std::basic_istream<CharT,Traits>& input, std::basic_string<CharT,Traits,Allocator>& str );

 (2)

template< class CharT, class Traits, class Allocator > std::basic_istream<CharT,Traits>& getline( std::basic_istream<CharT,Traits>&& input, std::basic_string<CharT,Traits,Allocator>& str );

 (2) (seit C++11)

getline liest Zeichen aus einem Eingabestrom und legt sie in einen String:

Original:

getline reads characters from an input stream and places them into a string:

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1)

Verhält sich wie UnformattedInputFunction, außer dass input.gcount() wird nicht beeinflusst. Nach dem Bau und Prüfung der Schildwache Objekt, führt die folgenden:

Original:

Behaves as UnformattedInputFunction, except that input.gcount() is not affected. After constructing and checking the sentry object, performs the following:

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1)

Ruft str.erase()

Original:

Calls str.erase()

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2)

Extrahiert Zeichen aus input und fügt sie str, bis eines der folgenden Ereignisse eintritt (markiert in der aufgeführten Reihenfolge)

Original:

Extracts characters from input and appends them to str until one of the following occurs (checked in the order listed)

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a)

End-of-File-Bedingung auf input, in diesem Fall getline Sets

eofbit

und kehrt .

Original:

end-of-file condition on input, in which case, getline sets

eofbit

and returns.

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b)

der nächste verfügbare Eingabezeichen ist delim, wie durch Traits::eq(c, delim), in welchem ​​Fall das Trennzeichen aus input extrahiert getestet wird, ist aber nicht darauf str angehängt .

Original:

the next available input character is delim, as tested by Traits::eq(c, delim), in which case the delimiter character is extracted from input, but is not appended to str.

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c)

str.max_size() Zeichen gespeichert wurden, in diesem Fall getline Sets

failbit

und kehrt .

Original:

str.max_size() characters have been stored, in which case getline sets

failbit

and returns.

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3)

Wenn keine Zeichen wurden aus irgendeinem Grund (nicht einmal die verworfen Trennzeichen), getline Sets

failbit

und kehrt extrahiert .

Original:

If no characters were extracted for whatever reason (not even the discarded delimiter), getline sets

failbit

and returns.

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2)

Gleiche wie getline(input, str, input.widen(’\n’)), das heißt, das standardmäßige Begrenzungszeichen ist die Endlinie Charakter .

Original:

Same as getline(input, str, input.widen(’\n’)), that is, the default delimiter is the endline character.

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Parameter

input -

der Strom, Daten von zu erhalten

Original:

the stream to get data from

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str -

die Zeichenkette zu setzen die Daten in

Original:

the string to put the data into

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delim -

das Trennzeichen

Original:

the delimiter character

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Rückgabewert

input

Beispiel

Der folgende Code fragt den Benutzer nach ihren Namen, dann grüßt sie mit diesem Namen .

Original:

The following code asks the user for their name, then greets them using that name.

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#include <string>
#include <iostream>
 
int main()
{
    std::string name;
    std::cout << "What is your name? ";
    std::getline(std::cin, name);
    std::cout << "Hello " << name << ", nice to meet you.";
}

Possible output: 

What is your name? John Q. Public
Hello John Q. Public, nice to meet you.