[ 新手练习 1 ] 批处理简易变量截取

TonyW

第一题：
@echo off
set i=今日明月在
set j=%i:~0,2%
echo %j%
set k=%i:~2,2%
echo %k%
set l=%i:~-1%
echo %l%
pause


第二题：
@echo off
set i=今日明月在
set j=%i:~2,2%
echo %j%
set k=%i:~0,2%
echo %k%
set l=%i:~-1%
echo %l%
pause


- -！我是新手，思维很死板！

hq624517491

set a=今日明月在
set b=%a:~0,2%
set c=%a:~2,2%
set d=%a:~4,1%
@echo %c%%b%%d%
@pause

hhsww

@echo off
set r=今日明月在
echo %r%
set m=%r:~0,2%
set n=%r:~2,2%
set l=%r:~4,1%
echo %n%%m%%l%
pause

myzwd

@echo off

setlocal enabledelayedexpansion
set tt=今日明月在
for  %%1 in (0 2 4) do (
    set  t%%1= !tt:~%%1,2!
)
echo !t2! !t0! !t4!

zjw767676

1. @echo off
   
2. set n=&set a=&set b=&set c=
   
3. set n=今日明月在
   
4. set a=%n:~0,2%
   
5. echo %a%
   
6. set b=%n:~2,2%
   
7. echo %b%
   
8. set c=%n:~-1%
   
9. echo %c%
   
10. set/p d=%b%%a%%c%<nul
    
11. pause

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[ 本帖最后由 zjw767676 于 2009-2-25 22:30 编辑 ]

keen

1. @echo off
   
2. setlocal enabledelayedexpansion
   
3. set var=今日明月在
   
4. set a=%var:~0,2% & echo !a!
   
5. set b=%var:~2,2% & echo !b!
   
6. set c=%var:~4,1% & echo !c!
   
7. pause

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Lumiere

1. @echo off
   
2. set str=今日明月在
   
3. set a=%str:~0,2%
   
4. set b=%str:~2,2%
   
5. set c=%str:~-1%
   
6. echo %a% %b% %c%
   
7. echo %b%%a%%c%
   
8. pause

复制代码

Lumiere

RT

1. @echo off
   
2. set str=今日明月在
   
3. set a=%str:~0,2%  b=%str:~2,2% c=%str:~-1%
   
4. echo %a% %b% %c%
   
5. echo %b%%a%%c%
   
6. pause

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我试了写成这样的的话显示会很奇怪。麻烦高手解释下。

Batcher

给set命令加上/a开关即可

Lumiere

多谢，这是很简单的语法问题，我忘记了，多谢提醒。

cainiao736

1. @echo off
   
2. set str=今日明月在
   
3. set a=%str:~0,2%
   
4. set b=%str:~2,-1%
   
5. set c=%str:~-1%
   
6. echo %b%%a%%c%
   
7. pause

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[ 本帖最后由 cainiao736 于 2009-3-26 21:59 编辑 ]

xiaotian

@echo off
set a=今日明月在
for /f "tokens=1 delims=明月在" %%a in ("%a%") do @echo %%a
for /f "tokens=1 delims=今日,在" %%b in ("%a%") do @echo %%b
for /f "tokens=1 delims=今日明月" %%c in ("%a%") do @echo %%c
pause
echo ----------------------------------------------------------------
echo ----------------------------------------------------------------
echo ----------------------------------------------------------------
set a=今日明月在
set var=%a:今日明月=明月今日%
echo %var%
pause

xiaotian

@echo off
set a=今日明月在
for /f "tokens=1 delims=明月在" %%a in ("%a%") do for /f "tokens=1 delims=今日,在" %%b in

("%a%") do for /f "tokens=1 delims=今日明月" %%c in ("%a%") do @echo %%a %%b %%c
pause
echo ----------------------------------------------------------------
echo ----------------------------------------------------------------
echo ----------------------------------------------------------------
set a=今日明月在
set var=%a:今日明月=明月今日%
echo %var%
pause

xiaotian

@echo off
echo 第一题:
set a=今日明月在
for /f "tokens=1 delims=明月在" %%a in ("%a%") do for /f "tokens=1 delims=今日,在" %%b in

("%a%") do for /f "tokens=1 delims=今日明月" %%c in ("%a%") do @echo %%a %%b %%c
pause
echo ----------------------------------------------------------------
echo ----------------------------------------------------------------
echo ----------------------------------------------------------------
echo 第二题:
set a=今日明月在
set var=%a:今日明月=明月今日%
echo %var%
pause

yinsigan

@echo off
set a=今日明月在
set b=%a:~0,2%
echo %b%
set c=%a:~2,2%
echo %c%
set d=%a:~-1%
echo %d%
pause


set a=今日明月在
set b=%a:~2,2%%a:~0,2%%a:~-1%
echo %b%
pause