FILES = main.o phone.o
CC	=	gcc
CFLAGS	=	-g -Wall -ansi -c
#	Note that with this setup we can change from gcc compiler to g++ 
#	By altering a single line!

#	The next line is invoked with "make phone" or just "make"
#	It causing the forming of the object files and  "loads" them 
#	into the executable.
phone:  $(FILES)
	$(CC) -o phone $(FILES)

#	Although will be done automatically if needed, "make main.o" otherwise
main.o: phone.h main.c
	$(CC) $(CFLAGS) main.c

#	Illustrates the benefits of macros
phone.o:    phone.c phone.h
	$(CC) $(CFLAGS) phone.c

#	To remove unwanted *.o files
clean:	$(FILES)
		/usr/bin/rm $(FILES)