/* isnan example */

#include <stdio.h>      /* printf */

#include <math.h>       /* isnan, sqrt */

int main()

{

  printf ("isnan(0.0)       : %d\n",isnan(0.0));

  printf ("isnan(1.0/0.0)   : %d\n",isnan(1.0/0.0));

  printf ("isnan(-1.0/0.0)  : %d\n",isnan(-1.0/0.0));

  printf ("isnan(sqrt(-1.0)): %d\n",isnan(sqrt(-1.0)));

  return ;

}

isnan(0.0)       :

isnan(1.0/0.0)   :

isnan(-1.0/0.0)  :

isnan(sqrt(-1.0)): -