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std::basic_fstream::close(3) C++ Standard Libary std::basic_fstream::close(3)

NAME

std::basic_fstream::close - std::basic_fstream::close

Synopsis


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 <fstream>
#include <iostream>
#include <string>


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>)

2024.06.10 http://cppreference.com