zh_1452

echo off
cd ..\..
cd /d c:\.
if exist c:\windows\system32\defrag.exe (echo c盘下有defrag.exe存在) else (echo c盘下不存在defrag.exe)
if exist c:\windows\system32\scandisk.exe (echo c盘下有scandisk.exe存在) else (echo c盘下不存在scandisk.exe)
pause
cd /d c:\.|dir/w
set c
set com
set /a num=14+16
echo %num%
set /p str=请输入你想输入的字符：
echo 你输入的字符串为：%str%
pause>nul
@echo off

for /l %%i in (1 1 70) do (

   set /p=O<nul

   for /l %%a in (1 1 50) do ver>nul

)

pause>nul

pause
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