[RandomCoder]

I think that a calculator will be much more achieveable to the majority of us here on the forum, I will definitely have a go at it... I promise to try harder this time

Stellaferox,
I in principle agree with you that we should have some rough guidelines that will allow us to measure how well the calculator works.
This could be as simple as a several mathematical expressions that need to be entered, a correct result would signify a pass (precision/decimal accuracy could be assessed).
Maybe the ability to do conversions could also be awarded additional marks.
Self-marking of the program should be possible, but do we start knowing what equations we need to solve or do we set the equations at the end of the competition?

Regards,
RandomCoder.