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第三题
@echo off
set var=bbs bathome.net
for %%i in (%var:.= %) do echo %%i
pause > nulCOPY
[color=BLUE]一切只为了批处理&DOS[/color]

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4
@echo off
type test.txt
echo.
for /f "tokens=2" %%i in (test.txt) do echo %%i
pause >nulCOPY
[color=BLUE]一切只为了批处理&DOS[/color]

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B1
@echo off
set aa=床前明月光,疑是地上霜。举头望明月,低头思故乡。
set a=%aa:,= %
for %%i in (%a:。= %) do echo %%i
pause >nulCOPY
[color=BLUE]一切只为了批处理&DOS[/color]

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B3
@echo off
for /l %%i in (100 -2 0) do (
echo %%i
set /a sum+=%%i
)
echo %sum%
pause >nulCOPY
[color=BLUE]一切只为了批处理&DOS[/color]

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B4
@echo off
for /f "delims=“” tokens=5" %%i in (1.txt) do echo %%i
pause >nulCOPY
[color=BLUE]一切只为了批处理&DOS[/color]

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B2
@echo off
for /r %%i in (mplayer.*) do echo %%~fnxi
pause >nulCOPY
不知道是否正确
[color=BLUE]一切只为了批处理&DOS[/color]

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