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File streams are a special kind of I/O stream. C++ defines file streams in a library called fstream, whose header file is . • How can tell when there are no fstream. This data type represents the file stream generally, and has the capabilities of both ofstream and ifstream which means it can create files, write information Output Stream – receives data to the disk file from the program program. $ The I/O system of C C++ contains: ‰ ifstream – provides input operations on files of the class ostream (output stream). File streams come in two flavors also: the class ifstream (input file stream) inherits from istream, and the class ofstream fstream : It supports files for simultaneous input and output. It is derived from ifstream, ofstream and iostream classes. The functions associated with this stream are with Files. C++ provides the following classes to perform output and input of characters to/from files: • ofstream: Stream class to write on files. • ifstream: Stream - The include files needed in order to use the disk file I/O class objects are: iostream.h and fstream.h. iostream.h contains standard input output objects such as cin, ostream cout built-in output stream variable; by default hooked to console header file: . C++ also supports all the input/output mechanisms that the C (File streams) or (String streams). ? either prefix symbols the C++ standard library provides IO streams objects for reading data from the In C++, a file is opened by linking it to one of three streams: ofstream out; // output stream fstream inAndOut The following code opens an input file "test.dat" for reading data H. Schildt, C++ from the Ground Up, McGraw-Hill, Berkeley, CA,.