Quote:
I want to Execute my program as slow as possible
Why? That's a pretty esoteric request...
If you want to force a slow execution, the only practical way is to use the operating system to slow your thread down by putting the task to sleep, either inside your loop or instead of it. Exactly how you do that we can't say, because it will vary from target system to system - but start by looking for "sleep" in the library documentation for your compiler / IDE.