operator>><div class="t-tr-text">(STD :: basic_istream)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">:</div><div class="t-tr-dropdown-orig">(std::basic_istream)</div><div class="t-tr-dropdown-notes"> [http://translate.google.com Google].<br/> . [http://en.cppreference.com/w/Cppreference:MachineTranslations ].</div></div></div></div></div>

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< cpp | io | basic istream

[]	Google. . , . , . ( . .)

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(C++20)

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/

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print (C++23)

/ C

basic_streambuf

basic_filebuf

basic_stringbuf

basic_spanbuf (C++23)

strstreambuf ( C++98)

basic_syncbuf (C++20)

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

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basic_ifstream

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basic_fstream

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basic_istringstream

basic_ostringstream

basic_stringstream

/

basic_ispanstream (C++23)

basic_ospanstream (C++23)

basic_spanstream (C++23)

istrstream ( C++98)

ostrstream ( C++98)

strstream ( C++98)

basic_osyncstream (C++20)

streamoff

streamsize

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iostream_category (C++11)

io_errc (C++11)

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std::basic_istream

: Global objects Google. . .

cinwcin

-

basic_istream::basic_istream

basic_istream::~basic_istream

basic_istream::operator= (C++11)

: Formatted input Google. . .

basic_istream::operator>>

: Unformatted input Google. . .

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

: Positioning Google. . .

basic_istream::tellg

basic_istream::seekg

: Miscellaneous Google. . .

basic_istream::sync

basic_istream::swap (C++11)

: Member classes Google. . .

basic_istream::sentry

,

operator>>(std::basic_istream)

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<tbody> </tbody>

template< class CharT, class Traits > basic_istream<CharT,Traits>& operator>>( basic_istream<CharT,Traits>& st, CharT& ch ); template< class Traits > basic_istream<char,Traits>& operator>>( basic_istream<char,Traits>& st, signed char& ch ); template< class Traits > basic_istream<char,Traits>& operator>>( basic_istream<char,Traits>& st, unsigned char& ch );	(1)
template< class CharT, class Traits> basic_istream<CharT,Traits>& operator>>( basic_istream<CharT,Traits>& st, CharT* s ); template< class Traits > basic_istream<char,Traits>& operator>>( basic_istream<char,Traits>& st, signed char* s ); template< class Traits > basic_istream<char,Traits>& operator>>( basic_istream<char,Traits>& st, unsigned char* s );	(2)
template< class CharT, class Traits, class T > basic_istream<CharT,Traits>& operator>>( basic_istream<CharT,Traits>&& st, T& value );	(3)	( C++11)

.

:

Performs character input operations.

Google.
. .

1)

ch.

:

Extracts a character and stores it to ch.

Google.
. .

2)

, , s. , :

:

Extracts successive characters and stores them at successive locations of a character array whose first element is pointed to by s. The extraction stops if one of the following conditions are met:

Google.
. .

• ( ctype<CharT> ) . .

  :

  a whitespace character (as determined by the ctype<CharT> facet) is found. The whitespace character is not extracted.

  Google.
  . .
• this->width() - 1

  :

  this->width() - 1 characters are extracted

  Google.
  . .

, CharT() .

:

In either case, an additional null character value CharT() is stored at the end of the output.

Google.
. .

3)

, RValue ( st >> value).

:

Calls the appropriate extraction operator, given an rvalue reference to an input stream object (equivalent to st >> value).

Google.
. .

(1-2) . , sentry , () ' , , ios_base :: skipws . , sentry true.

:

The (1-2) versions of the operator behave as formatted input functions. That is, they construct a sentry object at the beginning that flushes the tie()'d buffers if needed, checks for errors, and extracts and discards all leading whitespace characters unless the ios_base::skipws flag was cleared. The input is attempted only if the sentry object returns true.

Google.
. .

st		, : input stream to extract the data from Google. . .
ch		: reference to a character to store the extracted character to Google. . .
s		: pointer to a character string to store the extracted characters to Google. . .

st

#include <iostream>
#include <iomanip>
#include <sstream>

int main()
{
    std::string input = "n greetings";
    std::istringstream stream(input);
    char c;
    const int MAX = 6;
    char cstr[MAX];

    stream >> c >> std::setw(MAX) >> cstr;
    std::cout << "c = " << c << '\n'
              << "cstr = " << cstr << '\n';

    double f;
    std::istringstream("1.23") >> f; // rvalue stream extraction
    std::cout << "f = " << f << '\n';
}

:

c = n
cstr = greet
f = 1.23

.

operator>>

std::basic_istream (public -) []

:

• , source
• enclose