#made by kukisama
$a=(get-wmiobject -class Win32_PhysicalMemory  -namespace "root\cimv2").Capacity
$b=(get-wmiobject -class Win32_PerfFormattedData_PerfOS_Memory  -namespace "root\cimv2").AvailableMBytes
$c=$a/1024/1024
$d=$c-$b
cls
echo 您當前總內存$c 可用內存$b 已用內存$d