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 _modfl()                Split Long Double in Mantissa and Exponent

 #include   <math.h>

 long double modfl(x, intptr);
 long double x;                 Long double floating point number
 long double *intptr;           Pointer to integer part

    _modfl() is the long double precision version of modf(); it breaks
    a long double precision value into fraction and integer parts and
    returns the signed fractional portion. The integer part is
    pointed to by inptr. See modf() for more information.

    Returns:    The signed fraction part of x.

 Portability:   Not supported by the ANSI standard.