title: run the same exe with different argument simultaneous in c++
body: <p>Does anyone have idea to open same exe file with different arguments at same time in c++.<br>
  In the past, I always open multiple commend line in windows to run the exe simultaneously,<br>
  However, it seems not a best way to solve it.                                                                  Hence I try implement it in c++ to automatically run the multiple processing at same time.<br>
  I have tried <a href="https://stackoverflow.com/a/11464665/2469488">this</a>, but it still can not work....<br>
  my problem:<br>
  e.g. run<br>
  1. a.exe -dir D: -num 1000<br>
  2. a.exe -dir D: -num 1500<br>
  3. a.exe -dir D: -num 2500<br>
  at same time in c++.</p>