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 …

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 …

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, …

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 …

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

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 …

Stream buffer to read from and write to files. Constructed without association, these objects are associated to a file by calling member open. Once open, all input/output operations performed …

Output stream class to operate on files. Objects of this class maintain a filebuf object as their internal stream buffer, which performs input/output operations on the file they are associated …

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 …

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