hanyeguxing

@echo off
for /f "tokens=2 delims=_." %%i in ('dir /b abc\*.txt') do set ID_%%i=0
for /f %%I in ('set ID_') DO set/a n+=1
echo %n%&pause
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hanyeguxing

@echo off
for /f "tokens=2 delims=_." %%i in ('dir /b abc\*.txt') do set ID_%%i=0
(for /f "delims=" %%i in ('set ID_') do echo.)>tmp
for %%i in (tmp) do set/a n=%%~zi/2
echo.%n%
pause
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1万个ID_测试，比14楼的依然慢了0.28秒，惭愧一个。。。

[ 本帖最后由 hanyeguxing 于 2010-4-8 18:43 编辑 ]

hanyeguxing

原帖由 FOR 于 2010-4-7 20:39 发表
这样呢？@echo off
for /f "tokens=2 delims=_." %%i in ('dir /b abc\*.txt') do set ID_%%i=0
set ID_>tmp
for /f "tokens=3 delims= " %%I in ('find /c /v "" tem') do echo %%I
pause

抄袭14楼的,然后改了下：

@echo off
for /f "tokens=2 delims=_." %%i in ('dir /b abc\*.txt') do set ID_%%i=0
set ID_|find /c "0"
pause
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呵呵,1万个ID_测试,快了0.1秒

[ 本帖最后由 hanyeguxing 于 2010-4-8 18:42 编辑 ]