arithmetic : /usr/src/games/arithmetic/arithmetic.c \
  /usr/include/sys/types.h /usr/include/machine/endian.h \
  /usr/include/sys/cdefs.h /usr/include/machine/ansi.h \
  /usr/include/machine/types.h /usr/include/sys/signal.h \
  /usr/include/machine/signal.h /usr/include/machine/trap.h \
  /usr/include/ctype.h /usr/include/stdio.h /usr/include/string.h 
