zxd11097

@echo off
:循环十秒倒计时习题
for /l %%i in (10 -1 0) do (ping -n 2 127.0.1>nul&cls&echo %%i)
pause>nul
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@echo off
:循环十秒倒计时习题
set/a "a=11"
:zone
set/a "b=a-=1"
echo %b%
ping /n 2 127.1>nul&cls
if %b% equ 0 (pause>nul) else goto zone
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