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basic_fstream::basic_fstream

Constructs an object of type basic_fstream.

basic_fstream( );
explicit basic_fstream(
    const char *_Filename,
    ios_base::openmode _Mode = ios_base::in | ios_base::out,
    int _Prot = (int)ios_base::_Openprot
);
explicit basic_fstream(
    const wchar_t *_Filename,
    ios_base::openmode _Mode = ios_base::in | ios_base::out,
    int _Prot = (int)ios_base::_Openprot
);

Parameters

  • _Filename
    The name of the file to open.

  • _Mode
    One of the enumerations in ios_base::openmode.

  • _Prot
    The default file opening protection.

Remarks

The first constructor initializes the base class by calling basic_iostream(sb), where sb is the stored object of class basic_filebuf<Elem, Tr>. It also initializes sb by calling basic_filebuf<Elem, Tr>.

The second and third constructors initializes the base class by calling basic_iostream(sb). It also initializes sb by calling basic_filebuf<Elem, Tr>, and then sb.open(_Filename, _Mode). If the latter function returns a null pointer, the constructor calls setstate(failbit).

Example

See streampos for an example that uses basic_fstream.

Requirements

Header: <fstream>

Namespace: std

See Also

Concepts

basic_fstream Class

basic_fstream Members

iostream Programming

iostreams Conventions