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std::getline

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< cpp‎ | string‎ | basic string


 
 
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Null-terminated strings
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Classes
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basic_string
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Member functions
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basic_string::basic_string
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Element access
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basic_string::at
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Iterators
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basic_string::begin
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(C++11)
basic_string::end
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(C++11)
basic_string::rbegin
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(C++11)
basic_string::rend
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(C++11)
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Capacity
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Operations
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basic_string::clear
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Search
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basic_string::find
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Constants
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basic_string::npos
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getline
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to_string(C++11)
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hash<std::string>
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hash<std::u16string>
(C++11)
 
Defined 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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[Bearbeiten] 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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[Bearbeiten] Rückgabewert

input

[Bearbeiten] 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.