C++ LANGUAGE HEADER FILES

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C++ LANGUAGE HEADER FILES

HEADER FILES 

So far, we have been using the iostream standard library, which 
provides cin and cout methods for reading from standard input 
and writing to standard output respectively. 

This tutorial will teach you how to read and write from 
a file. This requires another standard C++ library called 
fstream, which defines three new data types:



Data Type  Description 


ofstream  This data type represents the output file 
                stream and is used to create files and to 
                write information to files. 

ifstream  This data type represents the input file 
                 stream and is used to read information from files. 

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 to files, and read information from files. 

To perform file processing in C++, header files <iostream> 
and <fstream> must be included in your C++ source file.