Use of <iostream> in c++

Question

In c language we use a header file <conio.h> because in this header file clrscr() & getch() fuctions are define.
so what functions are define in <iostream> header file

Answer 1

As <iostream> is a header it does not provide new keywords. Only compilers do that. I assume you actually want to know the functions, classes / structs, operators etc that are declared in <iostream>. It doesn't make sense to list all of them here as you can look them up by a few key strokes, if you have a decent development environment. Try to open the header file in your development environment. Many allow to open headers in a source code file.

Answer 2

header file should be declared top of the program

Answer 3

otherwise program makes error

Answer 4

it is imp. header file

Answer 5

it is a input/output stream

Answer 6

a header file