计算字符串的长度批处理
复制代码 代码如下:
@echo off & setlocal EnableDelayedExpansion 
:: 计算字符串的长度 
:: 
:: 
:began 
set mystr= 
set /p mystr=输入要计算长度的字符串(直接回车退出): 
if not defined mystr goto :eof 
for /l %%i in (0,1,1000) do if "!mystr:~%%i,1!"=="" set strlen=%%i && goto :_endfor 
:_endfor 
::echo 字符串: "%mystr%" 
echo 长 度: %strlen% 
set strlen= 
goto began 
该方案的缺陷是:当字符串长度超过1000的时候,将不能探测到;不过变量能接收的长度好象还不能超过1000 
另外一种方案: 
@echo off 
:: Based on willsort's codes code by JM 2006-10-9 CMD@XP 
:: 出处:http://www.cn-dos.net/forum/viewthread.php?tid=19819 
set mystr= 
set /p mystr=输入要计算长度的字符串(直接回车退出): 
if not defined mystr goto :eof 
set count=0 
setlocal enabledelayedexpansion 
:intercept 
set /a count+=1 
for /f %%i in ("%count%") do if not "!mystr:~%%i,1!"=="" goto intercept 
echo 长 度: %count% 
pause 
goto :eof 
@echo off 
:: 
:: 
:began 
set /p mystr=输入要计算长度的字符串: 
echo %mystr:~0,1% | findstr /i "q" 1>nul 2>nul && exit rem 输入q退出 
call :bflen "%mystr%" rem 这两句调用bflen,返回长度到变量ret中。 
echo 字符串: "%mystr%" 
echo 长 度: %ret% 
goto began 
:bflen rem 真麻烦,初始化要单独拿出来。 
set num= 
set str= 
set ret= 
set str=%1 
:len rem 计算字符串长度 
set str=%str:~0,-1% 
set /a num = %num% + 1 
if defined str goto len 
set /a ret = %num% - 2 
set num= 
goto :eof 
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