FSTREAM

This header provides the necessary classes and functions to perform file input and output operations using stream-based interfaces. It defines three main classes: ifstream for reading from files, ofstream for writing to files, and fstream for both reading and writing. These classes extend the capabilities of istream and ostream, enabling developers to work with files in the same way they handle standard input and output. This header supports various file modes through the ios flags (such as ios::in, ios::out, ios::app, ios::trunc, and ios::binary) to control how files are opened and manipulated. It allows opening files using constructors or the .open() method and ensures file integrity by enabling checks for successful file access. Overall, it provides a flexible and intuitive interface for reading from and writing to files.