-1.#IND in output???

[alyeska]

Hi, what does this output mean?

Discriminant = sqrtf(-16) or -1.#INDi

Program code is as follows:

cout << "Discriminant = sqrtf(" << discriminant << ") or ";
	d1 = sqrtf(discriminant);
	cout << d1 << "i" << endl << endl;

Thanks a lot!