Launch external application

[Crazyman582]

I'm looking for a way to launch an external application on linux. (other than system)/ I've been looking for some time but haven't been able to find what I'm looking for. Basically I want something that does this

  string program;
  cin >> program;
  launch program;

Thanks for any help you can give!

[koothkeeper]

Look at fork and exec or threads.