Does anyone know how to check if a double variable has 1.#INF, -1.#INF, 1.#IND?
Does anyone know how to check if a double variable has 1.#INF, -1.#INF, 1.#IND?
http://www.daemon-systems.org/man/isnan.3.html
Not entirely portable as far as I can tell.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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Apparently VC++ has _isnan if you're using that compiler: http://www.parashift.com/c++-faq-lit...html#faq-29.15
You can also compare against infinity:Although I don't know any caveats or details about this.Code:if (std::numeric_limits<double>::has_infinity && d == std::numeric_limits<double>::infinity()) std::cout << "Infinity!\n";
Thanks Salem....... I will look into it.
Thanks Daved....... I will look into it.
I believe one of the boost guys was working on a portable is_nan library. if you search the boost dev mailing list you should be able to find something on it.
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If you program in C++, you need Boost. You should also know how to use the Standard Library (STL). Want to make games? After reading this, I don't like WxWidgets anymore.Want to add some scripting to your App?
