【批处理】求取字符串长度

 1 @echo off 
 2 set /p str=请输入任意长度字符串：
 3 if not defined str goto :eof
 4 echo 您输入了：%str%
 5 set num=0
 6 :label
 7 set /a num+=1
 8 set str=%str:~0,-1%
 9 if defined str goto :label
10 echo 字符串长度：%num%
11 pause

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