VMS Help RTL Routines, MTH$, MTH$xREAL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The Real Part of a Complex Number routine returns the real part
    of a complex number.

    Format

      MTH$REAL  complex-number

      MTH$DREAL  complex-number

      MTH$GREAL  complex-number

      Each of the above formats accepts one of the floating-point
      complex types as input.

1 - Returns

    OpenVMS usage:floating_point
    type:         F_floating, D_floating, G_floating
    access:       write only
    mechanism:    by value

    Real part of the complex number. MTH$REAL returns an F-floating
    number. MTH$DREAL returns a D-floating number. MTH$GREAL returns
    a G-floating number.

2 - Argument

 complex-number

    OpenVMS usage:complex_number
    type:         F_floating complex, D_floating complex, G_floating
                  complex
    access:       read only
    mechanism:    by reference

    The complex number whose real part is returned by MTH$xREAL. The
    complex-number argument is the address of this floating-point
    complex number. For MTH$REAL, complex-number is an F-floating
    complex number. For MTH$DREAL, complex-number is a D-floating
    complex number. For MTH$GREAL, complex-number is a G-floating
    complex number.