A RetroSearch Logo

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Search Query:

Showing content from https://en.cppreference.com/w/cpp/language/../../cpp/../cpp/io/basic_istream/get.html below:

std::basic_istream<CharT,Traits>::get - cppreference.com

int_type get();

(1)

basic_istream& get( char_type& ch );

(2) (3) basic_istream& get( char_type* s, std::streamsize count, char_type delim ); (4)

basic_istream& get( basic_streambuf& strbuf );

(5)

basic_istream& get( basic_streambuf& strbuf, char_type delim );

(6)

Extracts character or characters from stream.

All versions behave as UnformattedInputFunctions. After constructing and checking the sentry object, these functions perform the following:

1)

Reads one character and returns it if available. Otherwise, returns

Traits::eof()

and sets

failbit

and

eofbit

.

2)

Reads one character and stores it to

ch

if available. Otherwise, leaves

ch

unmodified and sets

failbit

and

eofbit

. Note that this function is not overloaded on the types

signed char

and

unsigned char

, unlike the formatted character input operator>>.

3)

Same as

get(s, count, widen('\n'))

, that is, reads at most

std::max(0, count - 1)

characters and stores them into character string pointed to by

s

until

'\n'

is found.

4)

Reads characters and stores them into the successive locations of the character array whose first element is pointed to by

s

. Characters are extracted and stored until any of the following occurs:

In any case, if count > 0, a null character (CharT() is stored in the next successive location of the array.

5)

Same as

get(strbuf, widen('\n'))

, that is, reads available characters and inserts them to the given

basic_streambuf

object until

'\n'

is found.

6)

Reads characters and inserts them to the output sequence controlled by the given

basic_streambuf

object. Characters are extracted and inserted into

strbuf

until any of the following occurs:

If no characters were extracted, calls setstate(failbit).

All versions set the value of gcount() to the number of characters extracted.

[edit] Parameters ch - reference to the character to write the result to s - pointer to the character string to store the characters to count - size of character string pointed to by s delim - delimiting character to stop the extraction at. It is not extracted and not stored strbuf - stream buffer to read the content to [edit] Return value

1) The extracted character or Traits::eof().

2-6) *this

[edit] Exceptionsfailure

if an error occurred (the error state flag is not

goodbit

) and

exceptions()

is set to throw for that state.

If an internal operation throws an exception, it is caught and badbit is set. If exceptions() is set for badbit, the exception is rethrown.

[edit] Example
#include <iostream>
#include <sstream>
 
int main()
{
    std::istringstream s1("Hello, world.");
    char c1 = s1.get(); // reads 'H'
    std::cout << "after reading " << c1 << ", gcount() == " <<  s1.gcount() << '\n';
 
    char c2;
    s1.get(c2);         // reads 'e'
    char str[5];
    s1.get(str, 5);     // reads "llo,"
    std::cout << "after reading " << str << ", gcount() == " <<  s1.gcount() << '\n';
 
    std::cout << c1 << c2 << str;
    s1.get(*std::cout.rdbuf()); // reads the rest, not including '\n'
    std::cout << "\nAfter the last get(), gcount() == " << s1.gcount() << '\n';
}

Output:

after reading H, gcount() == 1
after reading llo,, gcount() == 4
Hello, world.
After the last get(), gcount() == 7
[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior LWG 370 C++98 the effect of overload (5) was get(s, count, widen('\n')),
which is the effect of overload (3) corrected to
get(strbuf, widen('\n')) LWG 531 C++98 overloads (3,4) could not handle the
case where count is non-positive no character is
extracted in this case [edit] See also

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4