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Originally posted by zw19750516 at 2008-7-14 10:39 AM:
效率问题出在这里：echo %input%|findstr >nul||set str=#%str:~1,-1%%#
在批处理中要尽量用if做判断，少用findstr。
Originally posted by zw19750516 at 2008-7-14 08:38 AM:
老土，代码第一是考虑效率，第二才是简洁，你这个方案存在效率问题，同时('echo %str%')可以修改为("%str%")。
@echo off
set/p input=请输入:
set string=0123456789abcdefghij
:pro1
set str=%input:~0,1%
set input=%input:~1%
call set string=%%string:%str%=#%%
if defined input goto pro1
set "str= "
:pro2
set str=%string:~-1%%str%%string:~0,1%
if %string:~0,1%==# set str=#%str:~1,-1%%#
if %string:~-1%==# set str=#%str:~1,-1%%#
set string=%string:~1,-1%
if not defined string goto end
goto pro2
:end
for /f "tokens=1,2 delims= " %%i in ("%str%") do echo %%j ^| %%i
pause| 评分人 | 分数 | 时间 |
|---|---|---|
| bat-zw | +6 | 2008-07-14 16:06 |
@echo off
set/p input=请输入:
set tab=012t456789abcd6fghi3
:pro1
call set tab=%%tab:%input:~0,1%=#%%
set input=%input:~1%
if defined input goto pro1
set "out= "
:pro2
set out=#%out%#
if not "%tab:~0,1%"=="#" if not "%tab:~-1%"=="#" set out=%tab:~-1%%out:~1,-1%%tab:~0,1%
set tab=%tab:~1,-1%
if defined tab goto pro2
for /f "tokens=1,2 delims= " %%i in ("%out%") do echo %%j ^| %%i
pause
Originally posted by qzwqzw at 2008-7-14 18:34:
再精简一下，思路更加清晰
@echo off
set/p input=请输入:
set tab=012t456789abcd6fghi3
:pro1
call set tab=%%tab:%input:~0,1%=#%%
set input=%input:~1%
if defined input ...
@echo off
setlocal enabledelayedexpansion
set/p input=请输入:
set tab=012t456789abcd6fghi3
set str=%tab%
set /a n-=1,m=0
:pro1
call set tab=%%tab:%input:~0,1%=#%%
set input=%input:~1%
if defined input goto pro1
:pro2
set/a n+=1,m-=1
if "!tab:~,1!"=="#" (set var1=!var1!!str:~%n%,1!&set var2=!str:~%m%,1!!var2!)else (
if "!tab:~-1!"=="#" (set var1=!var1!!str:~%n%,1!&set var2=!str:~%m%,1!!var2!)else set var1=%var1%#&set var2=#%var2%)
set tab=%tab:~1,-1%
if defined tab goto pro2
echo %var1% ^| %var2%
pause