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 cabsl()                 Calculate Long Double Abs Value of a Complex Number

 #include    <math.h>

 long double cabsl(z);
 struct _complexl z;

    This is the long double version of cabs(); it calculates the
    absolute value of a complex number which is defined with a _complexl
    structure:

         struct complexl{
                            long double x,y;
                            };

    See cabs() for more information.

    Returns:    The absolute value if successful, or _LHUGE_VAL on
                overflow.

 Portability:   Not supported by the ANSI standard.