File list (Check if you may need any files):
chengxu
.......\ad
.......\..\ad.c
.......\..\ad.cof
.......\..\ad.dbg
.......\..\ad.dp2
.......\..\ad.hex
.......\..\ad.lis
.......\..\ad.lk
.......\..\ad.lst
.......\..\ad.mak
.......\..\ad.mp
.......\..\ad.o
.......\..\ad.prj
.......\..\ad.s
.......\..\AD.SRC
.......\..\ad._c
.......\..\xianshi.c
.......\..\xianshi._c
.......\lesson8
.......\.......\lesson8.c
.......\.......\lesson8.cof
.......\.......\lesson8.dbg
.......\.......\lesson8.dp2
.......\.......\lesson8.hex
.......\.......\lesson8.lis
.......\.......\lesson8.lk
.......\.......\lesson8.lst
.......\.......\lesson8.mak
.......\.......\lesson8.mp
.......\.......\lesson8.o
.......\.......\lesson8.prj
.......\.......\lesson8.s
.......\.......\LESSON8.SRC
.......\.......\lesson8._c
.......\.......\Skey.c
.......\.......\Skey._c