

%external items


a)  The IMP9 keyword %extrinsic is replaced by %external ... %spec .

    Example:
          %extrinsic %integer %array A(1:500)          in IMP9
     becomes
          %external %integer %array %spec A(1:500)     in IMP80

    External variables  can  be  initialised,  like  own  variables,  in
    declaration statements, but not in specification statements.

    Example:
          %external %integer %array A(1:500) = 25(10), 14(72),
                                               16(22),63(*)

b)  External variables or procedures may be given an alias.  The form

          %alias "..."

    can  follow  the  identifier  name,  in  declaration  statements  or
    specification statements.

    Example:
         %external %real %function %spec SIN %alias "MATH$DSIN"(%real A)

    The string constant specifies the string to  be  used  for  external
    linkage  (i.e. the external reference).  From within the program the
    item is referred to by its identifier, in the usual way.