Re: [Dev-C++] Checking validity of float and double

[<jar...@ig...>]

On 26 Apr, Glen Corby wrote:
> This isnt a dev-C++ specific question, but i am wondering if anyone knows how you check if a float or double carrys valid data. 
> 
> My program runs fine most of the time but every now and again it spits out -NaN.
> I figure its from uninitialised variables, however I cant track down where they enter the program without performing periodick checks at suspect locations. 
> 
> So is there a function like 
>     bool validFloat(float num)  for instance?


Here a function from the open SciLab system (matlab clone)
try this

int mxIsNaN(double x)
{
  if ( x != x ) 
    return 1;
  else return 0;
}


-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
Institute of Technology, RWTH Aachen
D 52056 Aachen, Germany