Question

#include<iomanip.h> header file is not available why?

Answer 1

It is #include <iomanip> without the .h extension.

In C headers have a .h extension like stdlib.h and C++ headers don't have.

Normally you use for C headers the following statement: #include "stdio.h"

and for C++ headers: #inlcude <iostream>

Comments

for me the #include <iomanip> not getting included, when trying to do program as was done before, not working, states set not defined.