3.What are the different types of I/O streams used in C++? 4.Explain the salient features of the following header files. 1..input and output stream class (iostream> 2..input and out manipulator...

3.What are the different types of I/O streams used in C++?

4.Explain the salient features of the following header files.

1..input and output stream class (iostream>

2..input and out manipulator (iomanip>

3..input and output (ios)

5.What is a manipulator? List the merits and demerits of it.

6.Explain the syntactic rules governing cin and cout.