新建文件夹
..........\24秒倒计时
..........\..........\all.h
..........\..........\delay.LST
..........\..........\delay.OBJ
..........\..........\delay.c
..........\..........\delay.h
..........\..........\display.LST
..........\..........\display.OBJ
..........\..........\display.c
..........\..........\display.h
..........\..........\keyboard
..........\..........\keyboard.LST
..........\..........\keyboard.OBJ
..........\..........\keyboard.c
..........\..........\keyboard.h
..........\..........\main.LST
..........\..........\main.OBJ
..........\..........\main.c
..........\..........\test
..........\..........\test.M51
..........\..........\test.hex
..........\..........\test.lnp
..........\..........\test.plg
..........\..........\test.uvopt
..........\..........\test.uvproj
..........\..........\test_uvopt.bak
..........\..........\test_uvproj.bak
..........\..........\timer0.LST
..........\..........\timer0.OBJ
..........\..........\timer0.c
..........\..........\timer0.h
..........\练习所用.DSN