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Enterprise COBOL: Introduction
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Duration:
5 - 7 days (Course length depends on the experience and background of the students.) |
| Participants: Anyone with an interest in and an aptitude in being a COBOL programmer. Limited or no programming experience is assumed, unless otherwise specified by the client. |
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Objectives:
Upon successful completion of this course you will be able to:
- Describe and code the layout of a basic COBOL program. - Code COBOL programs with conditional and repetitive processing. - Code modular programs with inline and paragraph PERFORMs. - Code COBOL programs that read and write sequential files. - Code and run COBOL programs that process raw data or stored data. - Compile, link and run COBOL programs using JCL. |
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Overview:
- This first course of a multi-part series teaches you the basics of Enterprise COBOL application development. Topics include coding the four DIVISIONs, basic logic, data definitions ("raw" user data, COMP-3 (packed decimal) and Numeric Edited for reports), and sequential I/O processing. . - This course can be followed by Enterprise COBOL Programming: Intermediate and Enterprise COBOL Programming: Advanced, followed by other courses such as DB2 Programming, CICS COBOL Programming, VSAM COBOL Programming, etc. |
| Prerequisites: Students need to know z/OS concepts, basic z/OS JCL for JES2 or JES3, and TSO/ISPF. |
| Format: Lecture and hands-on computer workshops. Throughout the course, students perform many hands-on workshops and coding exercises to reinforce material presented in the lectures. |
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Topic Outline:
- Your First Enterprise COBOL Program What is Enterprise COBOL COBOL DIVISIONs Column layout - Compiling and Linking Your First Program Creating a Loadlib PDS Compile and Link PROC Compile and Link JCL - Running Your First Program and Helpful References Compiler Options (PARMs) Run JCL Manuals: Enterprise COBOL and Language Environment, and Glossary - Identification Division, Load Libraries and Documentation Coding the Identification Division Load Libraries and CSECTs Self-Documentation - Data Division Essentials The four SECTIONs of the DATA DIVISION Naming COBOL Variables/Identifiers Level Numbers Group and Elementary Items Picture Clauses Value Clause Numeric Edited Pictures Figurative Constants Data Continuation Numeric and Alphanumeric Literals/Values FILLER and Implied FILLER Blank When Zero Justified QUALIFICATION - for Duplicate Variable names REDEFINES WORKING-STORAGE Layout - COBOL Numbers COBOL Numbers Hexadecimal in COBOL Data Representation USAGE IS DISPLAY - EBCDIC USAGE IS COMP-3 Big Decimal Numbers - 31 Digits - Procedure Division Essentials: Arithmetic and Assignment ADD SUBTRACT MULTIPLY DIVIDE COMPUTE ON SIZE ERROR; NOT ON SIZE ERROR Explicit scope terminators MOVE - Procedure Division Essentials: Conditions, 88’s and IF’s Conditions Numeric and Alphabetic Class Tests IF and Nested IF Coding and Setting 88's Flags/switches vs conditions for testing business rules - Procedure Division Essentials: Looping with PERFORM IN-LINE PERFORMs OUT-OF-LINE/paragraph PERFORMs Paragraphs as modules Referencing Modification - Substring - Structured Programming Concepts Modular Programming Functional Decomposition Pseudocode Structured Code and Meaningful Names Comments Testing - Sequential File I/O I/O Processing SELECT...ASSIGN... FD - File Definition OPEN and CLOSE READ and READ INTO WRITE and WRITE FROM A Sample Program for Sequential I/O Sample JCL - I/O for Raw Data, Stored Data, and Reports Reading Raw Data Writing Stored Data Reading Stored Data Writing Simple Reports |
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