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

 complex-square-root

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

    Complex square root of the complex number specified by complex-
    number. The complex square root routines that have D-floating
    complex and G-floating complex input values write the complex
    square root into complex-square-root. For MTH$CDSQRT, complex-
    square-root specifies a D-floating complex number. For
    MTH$CGSQRT, complex-square-root specifies a G-floating complex
    number.

 complex-number

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

    Complex number (r,i). The complex-number argument contains the
    address of this complex number. For MTH$CDSQRT, complex-number
    specifies a D-floating number. For MTH$CGSQRT, complex-number
    specifies a G-floating number.