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

 real-part

    OpenVMS usage:floating_point
    type:         F_floating
    access:       read only
    mechanism:    by reference

    Real part of a complex number. The real-part argument is the
    address of a floating-point number that contains this real part,
    r, of (r,i). For MTH$CMPLX, real-part specifies an F-floating
    number.

 imaginary-part

    OpenVMS usage:floating_point
    type:         F_floating
    access:       read only
    mechanism:    by reference

    Imaginary part of a complex number. The imaginary-part argument
    is the address of a floating-point number that contains this
    imaginary part, i, of (r,i). For MTH$CMPLX, imaginary-part
    specifies an F-floating number.