Alvo 'clean' adicionado ao Makefile

makefile

@@ -30,4 +30,8 @@ main.o: main.cpp
 	${GCC} ${GCC_FLAGS} -c main.cpp
 
 tests.o: tests.cpp
-	${GCC} ${GCC_FLAGS} -c tests.cpp
\ No newline at end of file
+	${GCC} ${GCC_FLAGS} -c tests.cpp
+
+clean:
+	rm -f *.o
+	rm $(PROGRAM)
\ No newline at end of file