std::basic_fstream<CharT,Traits>::close (3) - Linux Manuals

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


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


void close();

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



Return value



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


// 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';


      std::cout << f1.is_open() << '\n'
                << f2.is_open() << '\n'
                << f3.is_open() << '\n';

Possible output:


See also

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