Lecture 2_11                   INTRODUCTION TO Ada II   586.2
 ( Review )

   Structuring large programs...  to make it look like JOVIAL

     Set up a package specification ( no body ) that contains all
     Ada TYPE and SUBTYPE specifications that are global to the
     total program. This package will be WITHed by all compilation
     units that use global types .

     Set up a package specification ( no body ) that contains all
     global objects. This includes arrays,records,pointers, etc.
     all data that requires memory global to the total program.
     This package is WITHed by all compilation units that use or
     set global data. 
   
          These two packages may be combined if the size is reasonable.

     Assuming the total program can be divided into major sections
     where there is considerable interaction within each section and
     some interaction with other sections ,
     Set up similar packages to the global packages for each section.

     At this point the major type and data structures are defined.


     Individual procedures can be written and compiled . The normal
     good programming practice is to have one logical function
     performed by a procedure or function.

     Groups of related procedures should be combined in a single
     package as long as it does not get too big.

     Tasks should physically reside in a package. An independent task
     may be alone in a package. Related tasks should be combined in
     a single package as long as it does not get too large. Tasks
     can be kept small by calling procedures to do the work for
     the tasks.

Note: Next week is final quiz, open book, open note, time limited
      There is also a course questionnaire to be filled out next week