[ 新手练习 1 ] 批处理简易变量截取

stalker

1. @echo off
   
2. set "target=今日明月在"
   
3. echo %target:~2,-1%%target:~0,2%%target:~-1,1%
   
4. pause>nul
   
5. exit

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辉少

@echo off
set str=今日明月在
echo %str%
echo %str:~0,2%
echo %str:~2,2%
echo %str:~4,1%
pause>nul

辉少

同样道理就可知道
@echo off
set str=今日明月在
echo %str%
echo %str:~2,2%%str:~0,2%%str:~4,1%
pause>nul

h5599859

@echo off
set a=今日明月在
echo %a:~2,2%%a:~0,2%%a:~4,1%
pause>nul

yan

1. echo 输入字符串
   
2. set/p str=
   
3. set var1=%str:~0,2%
   
4. set var2=%str:~2,2%
   
5. set var3=%str:~4,1%
   
6. set str=%var2%%var1%%var3%
   
7. pause

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firewolf85

1. @echo off
   
2. set str=今日明月在
   
3. echo 第一题：
   
4. for %%i in (0 2 4) do (
   
5. call set /p=%%str:~%%i,2%% <nul
   
6. )
   
7. echo.
   
8. echo 第二题：
   
9. for %%i in (2 0 4) do (
   
10. call set /p=%%str:~%%i,2%%<nul
    
11. )
    
12. pause>nul

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hxinhu12315

@echo off
set qq=今日明月在
echo %qq:~0,2%
echo %qq:~2,2%
echo %qq:~-1,1%

echo %qq:~2,2%%qq:~0,2%%qq:~-1,1%
pause

jadych

@echo off
set "str=今日明月在"
for /f %%i in ("%str%") do set/p =%str:~2,2%%str:~0,2%%str:~4,1%<nul
pause>nul

zhangenming

呵呵
@echo off
set var=今日明月在
echo %var:~2,1%%var:~3,1%%var:~0,1%%var:~1,1%%var:~4,1%
pause>nul

aresk

@echo off
set a=今日明月在
set temp1=%a:~0,2%
set temp2=%a:~2,2%
set temp3=%a:~4%
echo %temp1%
echo %temp2%
echo %temp3%
echo %temp2%%temp1%%temp3%
pause>nul

ccmvhd

@echo off
set ab=今日明月在
set ac=%ab:~0,2%
echo %ac%
set ad=%ab:~2,2%
echo %ad%
set ae=%ab:~-1%
echo %ae%
ping -n 2 127.1>nul
echo %ad%%ac%%ae%
pause>nul&exit

sihui11

1. @echo off
   
2. set var=今日明月在
   
3. set jie=%var:~0,2%
   
4. set qu=%var:~-3,2%
   
5. set li=%var:~4,5%
   
6. echo %jie%
   
7. echo %qu%
   
8. echo %li%
   
9. pause

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irresolute

第一题

1. @echo off
   
2. set "aa=今日明月在"
   
3. echo %aa:~,2%
   
4. echo %aa:~2,2%
   
5. echo %aa:~-1%
   
6. pause>nul

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第二题

1. @echo off
   
2. set "aa=今日明月在"
   
3. set /p=%aa:~2,2%<nul& set /p=%aa:~,2%<nul& set /p=%aa:~-1%<nul
   
4. pause>nul

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[ 本帖最后由 irresolute 于 2009-2-14 23:54 编辑 ]

irresolute

五楼用call取延迟变量是错的！改成这样就好了！

1. set str=今日明月在&call ,echo %%str:~0,2%%&call,echo %%str:~2,2%%&call,echo %%str:~-1,1%%&pause

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[ 本帖最后由 irresolute 于 2009-2-14 23:44 编辑 ]

irresolute

23楼改成如下会更好：

1. @echo off
   
2. set "str=今日明月在"
   
3. set/p =%str:~2,2%%str:~0,2%%str:~4,1%<nul
   
4. pause>nul

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