How do I detect infinite floats?

[Nialsh]

I know division by zero is valid in floating point and stores with a
special infinity value but is there a standard constant to cover
testing that or am I supposed to make my own each time?

Thanks
Neal

 

[owillebo]

http://www.gnu.org/software/libc/manual/html_node/Infinity-and-NaN.html

 

[red floyd]

http://www.gnu.org/software/libc/manual/html_node/Infinity-and-NaN.html

check std::numeric_limits<> as well. Doesn't have "is{infinity,nan,...}
but does have methods that return the values for them.

 

[Richard Herring]

check std::numeric_limits<> as well. Doesn't have
"is{infinity,nan,...} but does have methods that return the values for
them.

But don't forget that comparison with NaN may not have the result you
expect ;-)