FILES = main.o phone.o
CC	=	gcc
CFLAGS	=	-g -Wall -ansi

#	The next line is invoked with "make phone" or just "make"
phone:  $(FILES)
	$(CC) -o phone $(FILES)

#	Although will be done automatically if needed, "make main.o" otherwise
main.o: phone.h main.c
	gcc -g -Wall -ansi main.c

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