[系统相关] [已解决]批处理如何实现检测多个进程是否存在？

@echo off
for %%a in (a b c d) do (
    set p=%%a
    rem 每循环一次，p的值更替一次
    call echo;%%p%%
)
rem 最后p的值为最末一次循环的结果，不能判断哪个不存在
echo;----%p%
pause
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@echo off&setlocal enabledelayedexpansion
::举个栗子
rem 方法一
for %%a in (a b c d) do cmd /u /c echo;a c|find "%%a">nul||set "p=!p! %%a"
echo;缺%p%
pause
set p=
rem 方法二
for /f %%a in ('cmd /u /c echo;a b d^|more') do set "#%%a=1"
for %%a in (a b c d) do if not defined #%%a (set "p=!p! %%a")
echo;缺%p%
pause
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rem win7及以上系统运行
powershell -c "$list='a','b','c','d';$a=@{};$list|%%{$a[$_]=0};gps $list -ErrorAction SilentlyContinue|%%{$a[$_.Name]+=1};$c=@();foreach($b in $a.Keys){if($a[$b] -eq 0){$c+=(,$b)}};$a;if($c){\"`r`n不存在：\"+($c -join '; ')"}
pause
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@echo off&setlocal enabledelayedexpansion
set Pro1=a.exe
set Pro2=b.exe
set Pro3=c.exe
set Pro4=d.exe

for /f %%a in ('tasklist ^| findstr /i "%Pro1% %Pro2% %Pro3% %Pro4%"') do set "#%%a=1"
for %%a in (%Pro1% %Pro2% %Pro3% %Pro4%) do if not defined #%%a (set "p=!p! %%a")
mshta vbscript:Msgbox("%p%不存在!",64,"注意!")(window.close)
pause
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@echo off
setlocal enabledelayedexpansion
set Pro1=a.exe
set Pro2=b.exe
set Pro3=c.exe
set Pro4=d.exe
set n=0

for /f %%a in ('tasklist ^| findstr /i "%Pro1% %Pro2% %Pro3% %Pro4%"') do (
    set "#%%a=1"
    set /a n+=1
)
if !n! equ 4 (
    goto :end
)

for %%a in (%Pro1% %Pro2% %Pro3% %Pro4%) do if not defined #%%a (set "p=!p! %%a")
mshta vbscript:Msgbox("%p%不存在!",64,"注意!")(window.close)

:end
pause
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tasklist | findstr /i "%Pro1% %Pro2% %Pro3% %Pro4%"
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"!#%Pro1%!!#%Pro2%!!#%Pro3%!!#%Pro4%!"=="1111"

rem 上面原有一个编辑错误, 已更正
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@echo off
setlocal enabledelayedexpansion
set Pro1=a.exe
set Pro2=b.exe
set Pro3=c.exe
set Pro4=d.exe

for /f %%a in ('tasklist ^| findstr /i "%Pro1% %Pro2% %Pro3% %Pro4%"') do (
)
if "!#%Pro1%!!%#Pro2%!!#%Pro3%!!#%Pro4%!"=="111" (
    goto :end
)

for %%a in (%Pro1% %Pro2% %Pro3% %Pro4%) do if not defined #%%a (set "p=!p! %%a")
mshta vbscript:Msgbox("%p%不存在!",64,"注意!")(window.close)

:end
tasklist | findstr /i "%Pro1% %Pro2% %Pro3% %Pro4%"
echo "!#%Pro1%!!%#Pro2%!!#%Pro3%!!#%Pro4%!"
pause
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"!#%Pro1%!!%#Pro2%!!#%Pro3%!!#%Pro4%!"=="1111"
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"!#%Pro1%!!#%Pro2%!!#%Pro3%!!#%Pro4%!"=="1111"
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set /a "#%%a+=1"
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"!#%Pro1%!!#%Pro2%!!#%Pro3%!!#%Pro4%!"=="2211"
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for %%a in (%Pro1% %Pro2% %Pro3% %Pro4%) do if not defined #%%a (set "p=!p! %%a")
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