摘要：
我们先看一下下面dos代码：@echo offset num=Redtek 2006 bbs.cn-dos.netset a=123245set b=87754321echo.echo a=%a% b=%b% num=%num%set result=%%%%%%%%num:~%%%%b:~%a:~3,1%,1%%%%,4%%%%%%%%echo %result%call set result=%%%%%%%%num:~%%%%b:~%a:~3,1%,1%%%%,4%%%%%%%%echo %result%call call set result=%%%%%%%%num:~%%%%b:~%a:~ 阅读全文
