[已解决]最简单的倒记时批处理怎么写？

@echo off
for /l %%i in (10,-1,0) do (
    ping 127.0.0.1 -n 1 >nul
    echo %%i
)
pause
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@echo off
for /l %%i in (10 -1 0) do ping 192.168.0.2>nul 2>nul&echo %%i
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@Echo Off&SetLocal EnableDelayedExpansion
Rem 两小时倒计时
For /L %%i In (1,1,50) Do Set "tg=!tg! "
Set /A h=%Time:~,2%+2,m=%Time:~3,2%,s=%Time:~6,2%
If %h% GEQ 24 Set /A h-=24
:Lp
Set /A hto=h-%Time:~,2%,mto=(1%m%%%100)-(1%Time:~3,2%%%100),sto=(1%s%%%100)-(1%Time:~6,2%%%100)
If %sto% lEQ 0 set /A sto+=60,mto-=1
if %mto% lEQ 0 set /A mto+=60,hto-=1
If %hto% LSS 0 Set /A hto+=24
Set /P=当前距%h%:%m%:%s%还有%hto%小时%mto%分%sto%秒<Nul
For /L %%i In (1,1,2000) Do Ver>Nul
Set /P=%tg%<Nul
If "%hto%%mto%%sto%" Neq "000" Goto Lp
Cls&Echo 时间到
Pause>Nul
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@echo off
set "n=100"
:begin
cls&echo 请输入任意字母退出,否则%n%秒后程序将启动，计时：%n%秒
choice /c 1abcdefghijklmnopqrstuvwxyz /d 1 /t 1 /n
if %errorlevel% neq 1 goto :eof
set /a n-=1
if %n% neq 0 (goto begin) else (goto next)
:next
cls&echo 程序已启动&pause>nul
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timeout /t 10
rem 十秒倒计时
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