std::basic_fstream<CharT,Traits>::close

 

C++

Language

Standard Library Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

 

Input/output library

I/O manipulators

C-style I/O

Buffers

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (deprecated in C++98)

basic_syncbuf (C++20)

Streams

Abstractions

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

File I/O

basic_ifstream

basic_ofstream

basic_fstream

String I/O

basic_istringstream

basic_ostringstream

basic_stringstream

Array I/O

istrstream (deprecated in C++98)

ostrstream (deprecated in C++98)

strstream (deprecated in C++98)

Synchronized Output

basic_osyncstream (C++20)

Types

streamoff

streamsize

fpos

Error category interface

iostream_category (C++11)

io_errc (C++11)

 

std::basic_fstream

Member functions

basic_fstream::basic_fstream

basic_fstream::operator= (C++11)

basic_fstream::swap (C++11)

basic_fstream::rdbuf

File operations

basic_fstream::is_open

basic_fstream::open

basic_fstream::close

Non-member functions

basic_fstream::swap(std::basic_fstream) (C++11)

 

void close();

Closes the associated file.

Effectively calls rdbuf()->close(). If an error occurs during operation, setstate(failbit) is called.

Parameters

(none)

Return value

(none)

Notes

This function is called by the destructor of basic_fstream when the stream object goes out of scope and is not usually invoked directly.

Example

Run this code

#include <string>
#include <fstream>
#include <iostream>
 
int main()
{
    std::fstream f1("example1", std::ios::out),
                 f2("example2", std::ios::out),
                 f3("example3", std::ios::out);
 
    std::cout << std::boolalpha
              << f1.is_open() << '\n'
              << f2.is_open() << '\n'
              << f3.is_open() << '\n';
 
    f1.close();
    f2.close();
 
    std::cout << f1.is_open() << '\n'
              << f2.is_open() << '\n'
              << f3.is_open() << '\n';
}

Possible output:

true
true
true
false
false
true

See also

is_open	checks if the stream has an associated file (public member function)
open	opens a file and associates it with the stream (public member function)
close	flushes the put area buffer and closes the associated file (public member function of std::basic_filebuf<CharT,Traits>)