How to create my own header file in c++?

Yes, of course you can, but before that you need to learn what header files are and how you can use them properly.

file: yourname.h

#ifndef YOUR_NAME_INCLUDE
#define YOUR_NAME_INCLUDE

/* Your function statement here */
#endif

yourname.cpp

#include <iostream.h>
#include "yourname.h"

/* Your function definition here */

main.cpp

#include <iostream.h>
#include "yourname.h"

/* Your function calling here */

To learn more about header files and include statements, click the link below.

Header tutorial

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