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回复 5# tmplinshi
很好的东西，有做正则表达式，虽然只是字符串替换，但呈现的特性是美丽的，有求字符串长度的折半算法，实用性高，因为论坛经常有人问生成随机字符串的问题，也有标准exe的感觉，帮助内容很规范。
好的东西需要推广和完善，需要经得起实践的检验，建议以函数(实际为代码块)的方式发布，毕竟bat和exe是不一样的，如：

1.按照使用一般命令的习惯，使用者一般会忘记用call调用，如下的代码就会导致echo,456得不到执行：

@echo off
echo,123
rstr.bat
echo,456
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正确的用法：

@echo off
echo,123
call,rstr.bat
echo,456
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同理，因为忘记用call调用，会开启新的cmd进程执行rstr.bat，如下的代码会产生含执行路径的输出，影响效果或其他：

@echo off
for /l %%a in (1 1 5) do rstr
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输出：

da84f0qq8s

e:\test>rstr
tv78846dp3

e:\test>rstr
nxpx0f6hk0

e:\test>rstr
jutis5882j

e:\test>rstr
aun0gda121
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正确的用法：

@echo off
for /l %%a in (1 1 5) do call,rstr
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2.可能因为在很小的时间间隔内做相同的初始化工作的原因，如下的代码会产生重复的字符串，原因不明，猜测同一bat会分配相同的资源给for/f的命令部分使用。

@echo off
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
for /f "delims=" %%b in ('rstr') do echo,%%b
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输出：

3rggb4hzgo
3rggb4hzgo
3rggb4hzgo
3rggb4hzgo
3rggb4hzgo
3rggb4hzgo
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
frwrek6nok
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