Jump to content
  • Advertisement

Archived

This topic is now archived and is closed to further replies.

Eric

QNaN

This topic is 6087 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

I need a way, in C, to use the float QNaN value directly. In other words, how could I define QNAN in this example?
  
float a = QNAN;
int b;

b = ( a != QNAN );
  
This works, but seems kludgy:
  
#define QNAN   GetQNAN()

float GetQNAN(void)
{
    unsigned int b = 0xfff80000; // hex representation of QNaN

    return *(float*)(&b);
}
  
I read about something in C++ called reinterpret_cast that looked like it might have been useful, but again, I''m looking for a C solution. Any suggestions are appreciated!

Share this post


Link to post
Share on other sites
Advertisement

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

Participate in the game development conversation and more when you create an account on GameDev.net!

Sign me up!