Sorry yeah i was thinking that with vector i can use in this example but i can do too with this:
Qt Code: 
  1. QProcess consola;
  2. if(comando.left(2)=="cd"){
  3.             QDir::setCurrent(comando.mid(3));
  4.             consola.start("cmd.exe /C " + comando);
  5.          }
  6.         if(comando==".."){
  7.             QDir::setCurrent("..");
  8.         }
  9.         consola.start("cmd.exe /C " + comando);
  10.      consola.waitForFinished();
  11.     consola.waitForReadyRead();
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The only thing sometimes when i change the directory show me this:
QProcess::start: Process is already running
QProcess::start: Process is already running

when you say Your other account's problem yeah sorry i forgot how to access in them. i lost the pass to re-enter again.

Anyways i want to learn about vector's like push_back or store string but at the moment i'm not doing one example only for this and i was thinking would be nice to store the path one big mistake.

Sorry again for all and for help me a lot.