F95 = gfortran
FFLAGS = -O
LFLAGS = 

%.o: %.f95
	$(F95) $(FFLAGS) -c $*.f95

obj = main.o hello.o world.o

out.txt: $(obj) makefile
	$(F95) $(obj) -o main
	./main > out.txt
	cat out.txt

clean:
	rm -f $(obj) core* main out.txt