Thread: Modular Programming

hi all
take a look at this codes

Code:

/*source.c*/
#include<stdio.h>
#include "file.h"
main()
{
      char *name="strom man\n";
      sy_hay(name);
      }

Code:

/*file.c*/
#include "file.h"
void say_hay(char *string)
{
     printf("Hy %s",string);
     }

Code:

/*file.h*/
void say_hay(char *string);

i get this

Code:

  Circular ss <- ss.o dependency dropped.

? i don't get it ? why is that?