defined die function

src/chat/server/main.c

@@ -21,7 +21,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <sys/socket.h>
 #include <sys/types.h>
 
-#include <netinet/in.h>
+void die(char *exit_message);
 
 int main(void)
 {
@@ -57,3 +57,8 @@ int main(void)
 
     return 0;
 }
+
+void die(char *exit_msg)
+{
+    fprintf(stderr, "%s\n", exit_msg);
+}