How to make a .h file?

[TR15220]

I have some code I'd like to use by having an include statement using Borland C++. It is just C code not C++.

How do I do this?
Can you just copy the .c file to a .h extension?
Are there any Environment Variables I need to set to find the .h file or it there a specific directory it should be in to work?

Thanks in advance for any help!!!!!

[Draco]

all you have to do is put your code into a file that ends in .h . It is generally the best practice to always keep your header file in the same folder as your source file. You dont need to do anything else.

[linuxdude]

Usually you only keep #define and other preprocessive derectives in a .h file. It is also good to do typedef's and extern. But have c code in there is bad practice if you another c file the use modular programming and include that part in the other program.

#include <stdio.h>
#include "mycfile.c"

[whistlenm1]

myheader.h file

#ifndef MYHEADER_H
#define MYHEADER_H

int x;
float y;
enum qt {a, b, c} q;
//class, structs, function prototypes

#endif

myheader.c/cpp file

#include "myheader.h"

define functions, methods.

prog1.c/cpp

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

int main(void)
{
   // call data types and functions from
   // myheader.h and myheader.cpp
  // as need be!
  return(0);
}

Also note: DevC++ think projects and M$ Visual Studio think solution!

[TR15220]

Thanks for all the replys.

I will be trying out your suggestions.

Thanks again!!!

[WaltP]

Originally posted by TR15220
I have some code I'd like to use by having an include statement using Borland C++. It is just C code not C++.

How do I do this?
Can you just copy the .c file to a .h extension?
Do NOT copy the .c file to a .h!!! A header file should have only declarations in it. It should not have code nor variables defined

Are there any Environment Variables I need to set to find the .h file or it there a specific directory it should be in to work?

Thanks in advance for any help!!!!!

For any subroutines defined that need to be available in other modules add the prototypes to the header file (remove them from the source file). Any global variables that are defined in the source that will be needed elsewhere, add externs to the header for those variables.