Library /sys$common/syshlp/helplib.hlb  —  CRTL  fp_class
    Determines the class of IEEE floating-point values.

    This function is supported on OpenVMS Integrity servers and
    Alpha only.

    Format

      #include  <math.h>

      int fp_class  (double x);

      int fp_classf  (float x);

      int fp_classl  (long double x);
Additional Information: explode extract
Argument Description Return Value
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