Thread: Preprocessor Directivies

Hi all,

I am struggling to understand how to implement the below preprocessor directives. If for example I want to use the FORD code, how would I use/ access this code. Do I put this code in main.c, or in a header.h file. Then if I have a function initialize() in main.c, how would I call FORD from this function?

Look forward to your feedback.

Thanks Rocketman46

Code:

#if defined FORD
        
	// code


#elif defined HONDA
        
	// code


#endif
 
        // code
 
#if defined FORD


        // code


#elif defined HONDA


        // code


#endif
        
	// code
 
#ifdef FORD


        // code

Hi,

Thanks for your reply. So the below brief example, when initialize() is called, only the FORD code will be implemented.

Thanks

Rocketman46

Code:

#define FORD
#include <stdio.h>

void initialize(void)
{

#if defined FORD

    // code


#elif defined HONDA

    // code


#endif

    // code

#if defined FORD


    // code


#elif defined HONDA


    // code


#endif

    // code

#ifdef FORD


    // code

}

int main(void)
{
   initialize();

   while(1)
   {
     // execute code
   }

}