n#include
<iostream>
n–
It is a preprocessor command. Preprocessor command begins with a pound
sign(#) and perform some action before the compiler translate the source program into machine language.
n – Tells the compiler to read the file iostream.h . This file contains definition for stream input/output package.
n–
In our example, cout performs output onto the screen and therefore
requires the service provided in iostream.h
n