COMPLEX

For a declaration such as COMPLEX W, the variable W is usually two REAL*4 elements contiguous in memory, interpreted as a complex number.

If you do not specify the size, a default size is used.

The default size for a declaration such as COMPLEX W can be altered by compiling with any of the options -dbl, -r8, or -xtypemap. See the discussion in Chapter 2 for details.