:beginrem 其他命令set /a n1+=1goto begin
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set start=%time%
ping /n 2 localhost >nul
::要执行的命令
call b.bat %time%
echo 间隔为%errorlevel%
pause
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set /a 间隔=%1-%start%
::计时函数我就不写了哈
exit /b %间隔%
::exit /b后跟数字时，将以%errorlevel%变量的形式传递回父进程
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@echo off
%*
for %%a in (ping dir move findstr) do start /b "" "%0" goto %%a
pause&exit

:ping
ping localhost

:dir
dir c:\

:move
move %0 %tmp%

:findstr
findstr "^:" %0
rem 以上为各个模块，执行完毕后再call :计时

:计时
rem 省略
exit /b %间隔%
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@echo off
1:
set /p a=猜猜我是谁:
if %a%==5 doskey aaa=set bbb=你真厉害啊 $*
aaa
echo %bbb%
pause>nul
doskey aaa=
goto 1:
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