What float value makes sprintf_s() produce “1.#QO”?

Question

I have some (legacy embedded c) code which produces a .csv file by means of some sprintf calls. Occasionally I see values of 1.#QO. I\'ve tried rep

Answer 1

A little googling points to a divide by 0 error. Though I would expect something different if that were the case. That said, it appears to be specific to MS/Visual C.