How to create a Headly File 1

[Lauro]

Hi all!!!


Well,

I'd like to know how to create headly files in C language.
Someone can I help me?

 

[bluenote]

Here is the sample. be shure to compile both .c files together , and that the three files are in the same dir.

//file: myfunc.c
#include "myfunc.h"

long myadd(int a,int b){

  return a+b;
}

//end file myfunc.c
-------------------------------

//file myfunc.h

long myadd(int a,int b);

//end file myfunc.h


-------------------------

//file myfndemo.c

#include <stdio.h>
#include &quot;myfunc.h&quot;

void main(void){
  
  long result;


  result = myadd(5,5);

  printf(&quot;%ld\n&quot;,result);

}

//end file myfndemo.c

 

[Cagliostro]

don't forget about eliminating conflicts. All edclarations must be defined only once:

#if !defined(__MYFUNC_H)
/*if is already defined, code till #endif is ignored*/
#define __MYFUNC_H
long myadd(int a,int b);
#endif

So you will avoid doulbe insertion. For example you include this file and other file which include also this one.
John Fill

ivfmd@mail.md

 

[bluenote]

yes, you'r right, sorry for that ..........i typed online .... you know .... its just a practical sample

 

[Cagliostro]

never mind. John Fill

ivfmd@mail.md