What exactly do you want?? Any specific things..

Ok, I see. I just tested a bit this, and it's working ok. I will need some time to digest all this info (and faked info too ;P). If new quiery appear I will shout for help.:-D Thx, can I send to u some info about the robot, and some methods I intend to use to solve some problems? By the way are u good in maths? (probability and statistics?) If u want to answer to this, send the answer on my e-mail, plz. _____________________________ THX

Yes. Wasn't that answered here? "The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

So shouldn't you be opening the file with ios::out instead? "The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)