Prof Documentation
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By Henrik Johansson

PROF - a game for practising arithmetic

  The longer I use a calculator, the more I feel the need do practise
arithmetic in the head.  Therefore I wrote this program to make it a
little more easy and fun.  It's a little big, but that's because it
got out of hand and I implemented different levels of complexity too.
  Unfortunately the number input routine has some left to wish for, so
please don't enter anything but a number or just empty input.

To play: download either this program or the "ASC" version that
follows.  Store it under a "good" name and run it.  Chose between `+',
`-',. `*' or `/'.  Then chose level 1 (easy), 2 (medium) or 3 (hard).
The question apperas on the screen, and it is up to you to compute the
answer in the head and enter it.  If you just press <ENTER> the game
will end.

It is easy to cheat...if you are asked "28*29=" and don't want to
admit to your calculator that you don't know it then enter
"28 29 * <ENTER>" and the calc will think you did the right thing!

Feel free to send me hints, suggestions, praise, and comments.
If you like this, I will make it look a little better and maybe add a
few levels of complexity.
