>Since my teacher always said that 1/0 = infinite...

Thats not true, from what I've come up with at least. 1/0 results an infinite set of numbers, but not infinity, here's how I try and explain it:

if 0/X = 0, then X can be any possible number

So then 0/0 = X, X is still every possible number

So C/0 is simply undefined

Thats just how I looked at it.