D725: Advanced Topics in COBOL (Enterprise, z/OS): topical outline

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Advanced Topics in COBOL (Enterprise, z/OS) - Topical Outline

Day One

Introduction to Subroutines
    Invoking Subroutines - CALL
    Leaving a CALLed program
    Passing Arguments and Receiving Parameters
    Computer Exercise: A Mainline and Subroutines

Additional Subroutine Topics
    Static vs. Dynamic CALLS
    CALL ... ON OVERFLOW / EXCEPTION
    CANCEL
    Passing Arguments BY VALUE
    How arguments are passed
    How parameters are received
    Returning values: the RETURNING phrase
    Shared Data: the EXTERNAL Attribute
    Computer Exercise: External Subroutines and Shared Data

Nested Programs
     Nested Programs - The Concept
     Nested Program Structures
     The Uses of Nested Programs
     The INITIAL Attribute
    Computer Exercise: Nested Programs

Additional Subroutine Capabilities - Optional
    ENTRY Points
    Local-storage
    Recursive programs

Table Handling
    Tables and subscripts
    Loading a Table From a File
    Looking Up an Element in a Table
    Computer Exercise: Build and Print a Table

Day Two

Table Handling, II
Sorting a Table
Computer Exercise: Table Sorting

Table Handling, III
Variable Length Tables
Two-Dimensional Tables

Initializing Tables
    VALUE clauses, REDEFINES and INITIALIZE
    Loops and I/O
    PERFORM ... VARYING
    Computer Exercise: Two Dimensional Tables

Indexing
    Index-names and Index Data Items
    SET, SEARCH, SEARCH ALL
    Computer Exercise: Using Indexes and SEARCH

Intrinsic Functions and Tables
Concepts and Syntax
The ALL subscript

Day Three

Variable Length Records
    Defining
    Processing
    Computer Exercise: Reading a File With Variable Length Records

Introduction to String Handling In COBOL
    Hex Notation
    Reference Modification
    LENGTH OF special register (IBM extension)
    LENGTH intrinsic function
    INSPECT
    Computer Exercise: Analyzing Strings

More String Handling in COBOL
    STRING
    UNSTRING
    Computer Exercise: More String Handling

COBOL SORT Facility (Optional)
    Sort files
    The SORT verb
    Sort control statements
    MERGE
    Computer Exercise: COBOL SORT

Other Advanced Topics
    Null-terminated strings
    Pointers
    Address Of Special Register
    Procedure-pointers
    Function-pointers
    Dynamic file allocation

Course Objectives
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