A little confused here as to what you're trying to do but I think I can help get you headed in the right direction. First of all, try to use the code tags (see the "code" button below the message edit screen when posting) around your code. It makes things easier for people to read which means it's easier for people to understand and help.
Your for loop headers are not formed correctly. The for loop header should contain: initializer, condition, update. In your case the condition and update look fine but the initializer is not correct. "i<0" is not initializing the loop variable "i".
What does the CALLCLASS[i] statement do? Or rather, what's it supposed to do? Also, where do arr and arr2 come from?
Just a little more explanation and context is needed then we can help more.