+devices/arts.$(O): devices/arts.c devices/arts.h
+ $(C) devices/arts.c -o devices/arts.$(O)
+devices/record.$(O): devices/record.c devices/record.h
+ $(C) devices/record.c -o devices/record.$(O)
+devices/ops.$(O): devices/ops.c devices/ops.h
+ $(C) devices/ops.c -o devices/ops.$(O)