After awhile away I am back. I was busy doing other stuff and got sick of seeing questions about "simple calculators" (can't lecturers and teachers get more creative?) so I just had a break.
I'm wondering now if I should start my epic series again.
E.g.
http://cboard.cprogramming.com/c-pro...an-divide.html
http://cboard.cprogramming.com/c-pro...-multiply.html
http://cboard.cprogramming.com/c-pro...ars-shoes.html