pcl_test

1、findstr /o
http://www.bathome.net/redirect. ... =6186&ptid=1289

for /f "useback tokens=1 delims=:" %%a in (`"(echo;123&echo;)|findstr /o ."`) do set /a len=%%a-3
echo;%len%
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2、折半+查表
http://www.bathome.net/viewthread.php?tid=11799

set a=123fedcba9876543210&call set /a len=0x%%a:~15,1%%
echo;%len%
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3、

powershell "'123'.length"
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