basic_ofstream::is_open
Indicates whether a file is open.
bool is_open( ) const;
Return Value
true if the file is open, false otherwise.
Remarks
The member function returns rdbuf -> is_open.
Example
// basic_ofstream_is_open.cpp
// compile with: /EHsc
#include <fstream>
#include <iostream>
int main( )
{
using namespace std;
ifstream file;
// Open and close with a basic_filebuf
file.rdbuf( )->open( "basic_ofstream_is_open.txt", ios::in );
file.close( );
if (file.is_open())
cout << "it's open" << endl;
else
cout << "it's closed" << endl;
}
Output
it's closed
Requirements
Header: <fstream>
Namespace: std