a.bat内容


@echo off
::MSCDEX.EXE /D:MSCD001>NUL
OAKCDROM.SYS /D:?MSCD001>NUL
FINDCD.EXE /S>NUL1.txt ///输出结果在下面

CALL FINDCDR.BAT "xp.gho" C D E F G H I J K L M N O P Q R S T U V W X Y Z>1.txt ///输出结果在下面


FINDCDR.BAT内容
@echo off
set file=%1
:FCDR
if "%CDROM1%"=="%2:" goto SCDR ///为什么这的cdrom1是空呢???
shift
goto FCDR
:SCDR
cda %2:>nul
IF errorlevel 1 goto next
if not exist %2:\%FILE% goto next
set cdrom=%2
goto end
:next
if "%2"=="Z" goto end
shift
goto SCDR
:end

FINDCD.EXE /S>NUL1.txt 这句的结果
Invalid keyboard code specified
CDROM=2
CDROM1=I:
CDROM2=J:

有C D E F 那句的结果

H:\findcd>set file="xp.gho"

H:\findcd>if "" == "C:" goto end

H:\findcd>shift

H:\findcd>goto FCDR

H:\findcd>if "" == "D:" goto end

H:\findcd>shift

H:\findcd>goto FCDR

H:\findcd>if "" == "E:" goto end

H:\findcd>shift

H:\findcd>goto FCDR