DOS if esle 判断
@echo off
if not exist "c:\a\b\c\abc123.exe" (goto tagA) else (goto end)
:tagA
echo do.....
goto end
:end
exit
@echo off
if not exist "c:\a\b\c\abc123.exe" (goto tagA) else (goto end)
:tagA
echo do.....
goto end
:end
exit