HP 3000 Manuals

HP Pascal/iX Reference Manual

Declaration Part 

The declaration part consists of definitions of constants and types, and
declarations of labels, variables, procedures, functions, and modules.
The statement part is made up of a compound statement that may be empty
or may contain several simple or structured statements.  The statement
part is also termed the body or executable portion of the block.  For
more information about statements, refer to Chapter 6 .

The reserved word LABEL precedes the declaration of labels.  CONST or
TYPE precedes the definition of declared constants or types.  VAR
precedes the declaration of variables.  IMPORT precedes a list of
imported module names.  MODULE precedes the declaration of a module.
PROCEDURE or FUNCTION precedes the declaration of a procedure or a
function.

Within a declaration part, label declarations must come first, whereas
procedure or function declarations come last.  In HP Pascal, CONST, TYPE,
IMPORT, VAR, and MODULE declarations may be intermixed and repeated.  For
more information on declarations, refer to Chapter 5 .


NOTE  ANSI/IEEE770X3.97 - 1983 Standard Pascal allows the following
      reserved words, LABEL, CONST, TYPE, or VAR to be used only once in
      that order.


A predefined constant, type, variable, procedure, or function may be
redeclared in a declaration part.  However, access to the previous
definition associated with that item is lost within the scope in which it
is redefined.

Example 

     PROGRAM show_declarepart;

     LABEL  25;

     VAR
        birthday: integer;

     TYPE
        friends = (Joe, Simon, Leslie, Jill);

     CONST
        maxnuminvitee = 3;

     VAR
       invitee: friends;
     PROCEDURE hello;

     BEGIN
        writeln('Hi');
     END;                            { End of declaration part. }

     BEGIN                           { Beginning of body.       }
      .
      .
     END.

MPE/iX 5.0 Documentation