Section 8,4,3: Complex

 A complex constant consists of a pair of real or integer constants.
 The two constants are separated by a comma and enclosed in
 parentheses.  The first constant represents the real part of the
 number and the second constant represents the imaginary part.

 DEC Fortran supports COMPLEX*8 and COMPLEX*16 complex constants.

 A COMPLEX (COMPLEX*8) constant has the form:

  (c,c)             c is an integer or REAL (REAL*4) constant

 A DOUBLE COMPLEX (COMPLEX*16) constant has the form:

  (c,c)             c is an integer, REAL (REAL*4), or 
                    DOUBLE PRECISION (REAL*8) constant (at 
                    least one of the pair must be a DOUBLE 
                    PRECISION constant)