driver: driver.o CalendarItem.o Date.o Time.o
	g++ -Wall driver.o CalendarItem.o Date.o Time.o -o driver

driver.o: driver.cpp Date.h CalendarItem.h Time.h
	g++ -c driver.cpp

CalendarItem.o: CalendarItem.cpp CalendarItem.h Date.h Time.h
	g++ -c CalendarItem.cpp

Date.o: Date.cpp Date.h
	g++ -c Date.cpp

Time.o: Time.cpp Time.h
	g++ -c Time.cpp

clean:
	rm -f *.o *~