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nan and inf detection c++

General and Gameplay Programming Programming

Started by Asuralm February 28, 2008 12:11 PM

1 comment, last by Yann L 16 years, 1 month ago

Asuralm

123

Author

February 28, 2008 12:11 PM

Hi all: How can I detect if a value is nan or inf please? For example


float x;
...
if (x == nan || x == inf || x == -inf){
...
}

Can I do something like this please? Thanks

Asura

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Sneftel

1,788

February 28, 2008 12:13 PM

Check the functions in the cmath header. Specifically, isnan and isinf.

Yann L

1,806

February 28, 2008 02:29 PM

if( x != x ) {  // it's a nan}

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