DOS Batch command file HELP

今天工作遇到,記錄一下...

http://stackoverflow.com/questions/112055/what-does-d0-mean-in-a-windows-batch-file
http://www.computerhope.com/forhlp.htm
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/percent.mspx?mfr=true