File streams are associated with files either on construction, or by calling member open. This is an instantiation of basic_fstream with the following template parameters: ... Apart from the internal file …

Constructs an fstream object that is not associated with any file. Internally, its iostream base constructor is passed a pointer to a newly constructed filebuf object (the internal file stream buffer).

Modifies the fstream object. Concurrent access to the same stream object introduce data races. Exception safety Basic guarantee: if an exception is thrown, the stream is in a valid state. It throws …

<fstream> File streams Header providing file stream classes: Class templates basic_ifstream Input file stream (class template) basic_ofstream Output file stream (class template) basic_fstream File stream …

For fstream, the default value is only applied if the function is called without specifying any value for the mode parameter. If the function is called with any value in that parameter the default mode is …

These instantiations are declared in <fstream>. Member types The class declares the following member types: ... These member types are inherited from its base classes basic_istream, basic_ostream and …

Constructs a basic_fstream object that is not associated with any file. Internally, its basic_iostream base constructor is passed a pointer to a newly constructed basic_filebuf object (the internal file stream …

In this example, tellg is used to get the position in the stream after it has been moved with seekg to the end of the stream, therefore determining the size of the file. Data races Modifies the stream object. …

Output stream class to operate on files using wide characters. This is an instantiation of basic_ofstream with the following template parameters:

Parameters filename String with the name of the file to open. Specifics about its format and validity depend on the library implementation and running environment. mode Flags describing the …