header file reg

[jeyshree]

Hai,
I wrote two functions in separate files named fibonacci.c and factorial.c
Will you please let me know how to place those two functions in a header file named hai.h,so that i can use them in other c files?Thanks for your reply in advance.

[divideby0]

in hai.h, declare the function prototypes.

#ifndef __MYHEADER_HAI__
#define __MYHEADER_HAI__
 
void foo_1(void); // from fibonacci.c
void foo_2(void); // from factorial.c
 
#endif

include the header in the source files

// fibonacci.c
 
#include "hai.h"
 
void foo_1(void) {
   // definition
}

// factorial.c
 
#include "hai.h"
 
void foo_2(void) {
   // definition
}

in the main source file

#include "hai.h"
 
int main(void) {
   // do something with foo_1() and foo_2()
}

compile the sources; for example
cl main.c fibonacci.c factorial.c

I usually have good luck with something like that.