CFLAGS=-Wall

.PHONY: all
all: program

a.o: a.h a.c
	gcc $(CFLAGS) -c a.c

b.o: b.h b.c
	gcc $(CFLAGS) -c b.c

program: c.c a.o b.o
	gcc $(CFLAGS) c.c a.o b.o -o program

.PHONY: clean
clean:
	rm -f *.o
	rm -f program