MapleStory Calculator [Version 1.00b]

That's because you need 3819 accuracy to 100% hit them at level 200. return 0 will be wrong, because you will hit with and damage as long you have enough accuracy to hit the monster. Either way, we don't know the 200 level monsters will deal with that.

Yes, and no one has 3819 accuracy, so why bother?

return 0 will make the whole damage range 0, and then 1-correction (which JT implemented, I assume) makes all damage 1. Supposing it hits.