arithmetic

arithmetic—quiz on simple arithmetic.

A "functional" port of the classic Unix game, for no particular reason, to Golang. Largely inspired by Eamon McManus' version that ships with bsdgames.

Key differences:

1. Added support for Unicode symbols (÷ and ×). Use the -u flag to replace the standard ASCII symbols.
2. Both the problem and its answer will be within the provided range.
3. Anywhere between 15 and 30 questions are asked in a go - this helps create some variation.
4. Limited the maximum range such that overflows are avoided. This can be seen if -r is set to 0. The original program had a limit of 100, while McManus' version had no limit to the maximum range.
5. Penalisation is a little more lax.