How to make header files in c++

Hmmm.. I think you new to C++.

Open up your text editor, start prototyping your fuctions. your header should not contain any definitions, these should be done in a seperate source file that is linked to your project. In any header, you're going to want a header guard to prevent multiple definitions (if the library is included twice in the project).This tends to look like the following and all of your code should be in closed within the guard:

#ifndef MYHEADERNAME_H
#define MYHEADERNAME_H

/* Your code here*/

#endif

Always use a header guard like the one above. Do not use the #pragma once directive as that is not portable in the least. Once you've completed the code,you can go ahead and save it in the directory of your project with the .h extension. It is then accessed in your code by:
#include "pathofmyheader/nameofmyheader.h"

The path may be ommited if your header is in the same folder as your source code.

Tutorial Site are follows:

1)cplusplus.com/doc/tutorial
2)glenmccl.com/tutor.htm
3)learncpp.com

If you will not get information you required through above sites, just use Google to find anything about C++.