std::getline
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| definiert in Header <string>
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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:The text has been machine-translated via Google Translate.
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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:The text has been machine-translated via Google Translate.
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1)
Ruft
str.erase()Original:
Calls
str.erase()The text has been machine-translated via Google Translate.
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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)The text has been machine-translated via Google Translate.
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a)
End-of-File-Bedingung auf
input, in diesem Fall getline Sets eofbit und kehrt .Original:
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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.The text has been machine-translated via Google Translate.
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c)
str.max_size() Zeichen gespeichert wurden, in diesem Fall getline Sets failbit und kehrt .Original:
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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.The text has been machine-translated via Google Translate.
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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.The text has been machine-translated via Google Translate.
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Parameter
| input | - | der Strom, Daten von zu erhalten
Original: the stream to get data from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| str | - | die Zeichenkette zu setzen die Daten in
Original: the string to put the data into The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| delim | - | das Trennzeichen
Original: the delimiter character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
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.