factorial: main.o fact.o
	gcc main.o fact.o -o factorial

main.o: main.c fact.h
	gcc -Wall -c main.c

fact.o: fact.h fact.c
	gcc -Wall -c fact.c

tests: tests.c fact_tests.c fact.o
	gcc -o tests tests.c fact.o

test: tests
	./tests

clean:
	rm -f factorial *.o tests