std::basic_istream::read – cppreference.com

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`basic_istream& read( char_type* s, std::streamsize count );`

Extrahiert Zeichen von stream .

Original:

Extracts characters from stream.

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Verhält sich wie UnformattedInputFunction. Nach dem Bau und Prüfung der Schildwache Objekts, extrahiert Zeichen und speichert sie in aufeinander folgenden Aufenthaltsorten der Zeichen-Array, dessen erstes Element wird durch s hingewiesen. Zeichen werden extrahiert und gespeichert werden, bis eine der folgenden Bedingungen auftritt:

Original:

Behaves as UnformattedInputFunction. After constructing and checking the sentry object, extracts characters and stores them into successive locations of the character array whose first element is pointed to by s. Characters are extracted and stored until any of the following conditions occurs:

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count Zeichen wurden extrahiert und gespeichert
Original:
count characters were extracted and stored
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Fileende Bedingung tritt auf der Eingabesequenz (in welchem Fall setstate(failbit|eofbit) genannt .
Original:
end of file condition occurs on the input sequence (in which case, setstate(failbit|eofbit) is called.
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Parameter

s	-	Zeiger auf den Zeichen-Array, um die Zeichen zu speichern Original: pointer to the character array to store the characters to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	Zahl der zu lesenden Zeichen Original: number of characters to read The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Rückgabewert

*this

Beispiel

read () wird oft für binäre verwendeten I / O

Original:

read() is often used for binary I/O

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#include <iostream>
#include <string>
#include <sstream>
#include <cstdint>
int main()
{
    std::string bin = {'\x12', '\x12', '\x12', '\x12'};
    std::istringstream raw(bin);
    std::uint32_t n;
    raw.read(reinterpret_cast<char*>(&n), 4);
    std::cout << std::hex << std::showbase << n << '\n';
}

Output:

Siehe auch

}


write	Einsätze Blöcken von Zeichen Original: inserts blocks of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion of `std::basic_ostream`) [edit]

operator>>	Extrakte formatierte Daten Original: extracts formatted data The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) [edit]

readsome	extrahiert bereits verfügbaren Blöcke von Zeichen Original: extracts already available blocks of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) [edit]

get	Extrahiere Zeichen (öffentliche Elementfunktion) [edit]

getline	Extrakte Zeichen, bis die gegebene Zeichen gefunden wird Original: extracts characters until the given character is found The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) [edit]

fread	liest aus einer Datei Original: reads from a file The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktion) [edit]