179023774 labguide cobol la01 lc pdf
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COMPANY CONFIDENTIAL
Lab Guide for COBOL Programming
Author(s) Karthigai Priya G/Fayaz Basha S.K.
Authorized by Dr.M.P.Ravindra
Creation/Revision Date 03-2007
Version 3.0
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COPYRIGHT NOTICE
All ideas and information contained in this document are the intellectual property of Education and Research Department, Infosys Technologies Limited. This document is not for general distribution and is meant for use only for the person they are specifically issued to. This document shall not be loaned to anyone, within or outside Infosys, including its customers. Copying or unauthorized distribution of this document, in any form or means including electronic, mechanical, photocopying or otherwise is illegal.
Education and Research Department
Infosys Technologies Limited
Electronic City Hosur Road
Bangalore - 561 229, India.
Tel: 91 80 852 0261-270
Fax: 91 80 852 0362
www.infy.com mailto:E&R@infy.com
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Infosys Technologies Limited Document Revision History
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Document Revision History
Version Date Author(s) Reviewer(s) Comments 0.0 Aug-05 Narasimha
Murthy/Priya Murali Konareddy
Initial Draft
1.0 Sep-06 Murali/ Narasimha Murthy/Priya
Murali Konareddy
Incorporated the review comments
2.0 03-2007 Karthigai Priya G/Fayaz Basha S.K.
Murali Konareddy
FP Restructure 2006-2007
3.0 Sep-2007 Fayaz Basha SK Murali Konareddy / Shashank
FP Restructure 2006-2007
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Infosys Technologies Limited Table of Contents
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Contents
COPYRIGHT NOTICE ....................................................................................................... I
COPYRIGHT NOTICE ...................................................................................................... II
DOCUMENT REVISION HISTORY ......................................................................................... I
CONTENTS .................................................................................................................. II
CONTEXT ................................................................................................................... 1
DAY 1 ASSIGNMENTS ..................................................................................................... 1
ASSIGNMENT 1: WRITING A COBOL CODE IN THE CODING SHEET, EXECUTING AND VIEWING THE OUTPUT IN SPOOL ....... 1
ASSIGNMENT 2: DEBUGGING A COBOL PROGRAM .......................................................................... 2
ASSIGNMENT 3: UNDERSTANDING COBOL CODING STANDARDS ............................................................. 2
ASSIGNMENT 4: UNDERSTANDING ARITHMETIC STATEMENTS IN COBOL .................................................... 3
ASSIGNMENT 5: UNDERSTANDING EDITED PICTURE CLAUSES AND MOVE VERB ............................................. 4
ASSIGNMENT 6: UNDERSTANDING THE LEGAL MOVES IN COBOL ......................................................... 5
ASSIGNMENT 7: EXERCISES FOR SELF REVIEW ............................................................................... 6
DAY 2 ASSIGNMENTS ..................................................................................................... 6
ASSIGNMENT 1: DEMONSTRATION OF ON SIZE ERROR CLAUSE ............................................................ 6
ASSIGNMENT 2: UNDERSTANDING PERFORM..UNTIL VERB ............................................................. 9
ASSIGNMENT 3: GENERATION OF PAY SLIP OF AN EMPLOYEE USING ARITHMETIC VERBS, ROUNDED AND ON SIZE ERROR
CLAUSES .................................................................................................................. 12
ASSIGNMENT 4: GENERATING GRADE SHEETS OF STUDENTS USING PERFORM VERBS AND IF..THENELSE ............ 13
ASSIGNMENT 5: USING PERFORM.UNTIL VERB TO ACCEPT CHOICE FROM USER AND DISPLAY THE OUTPUT ............ 15
ASSIGNMENT 6: USING PERFORM.VARYING TO GENERATE N ELEMENTS OF FIBONACCI SERIES ..................... 15
ASSIGNMENT 7: EXERCISES FOR SELF REVIEW ............................................................................. 16
DAY 3 ASSIGNMENTS ................................................................................................... 16
ASSIGNMENT 1: CREATION OF PS FILE AND UNDERSTANDING THE READ OPERATION OF A PS FILE ......................... 16
ASSIGNMENT 2: UNDERSTANDING WRITE OPERATION OF A PS FILE ........................................................ 17
ASSIGNMENT 3: APPENDING RECORDS TO A PS FILE ....................................................................... 18
ASSIGNMENT 4: UPDATING RECORDS IN A PS FILE ......................................................................... 18
ASSIGNMENT 5: UNDERSTANDING SEQUENTIAL FILE MANIPULATIONS ...................................................... 19
ASSIGNMENT 6: EXERCISES FOR SELF REVIEW ............................................................................. 20
DAY 4 ASSIGNMENTS ................................................................................................... 21
ASSIGNMENT 1: UNDERSTANDING READ AND WRITE OPERATIONS IN A VSAM KSDS FILE ................................ 21
ASSIGNMENT 2: UNDERSTANDING THE VSAM KSDS FILE MANIPULATIONS ................................................ 26
ASSIGNMENT 3: UNDERSTANDING COPY VERB ........................................................................... 27
ASSIGNMENT 4 : UNDERSTANDING CALL VERB ........................................................................... 31
ASSIGNMENT 5: CREATION OF MODULAR COBOL PROGRAMS ............................................................. 34
ASSIGNMENT 6: UNDERSTANDING VSAM KSDS FILE AND PS FILE MANIPULATIONS ........................................ 35
ASSIGNMENT 7: CREATION OF ALTERNATE INDEX FOR A VSAM KSDS FILE ................................................ 35
ASSIGNMENT 8: EXERCISES FOR SELF REVIEW ............................................................................. 36
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DAY 5 ASSIGNMENTS ................................................................................................... 36
ASSIGNMENT 1: DEMONSTRATION OF ONE DIMENSIONAL ARRAY........................................................... 36
ASSIGNMENT 2: DEMONSTRATION OF STRING AND UNSTRING VERB .................................................... 38
ASSIGNMENT 3: DEMONSTRATION OF INSPECT VERB .................................................................... 40
ASSIGNMENT 4: DEMONSTRATION OF SEARCH ALL VERB ................................................................ 41
ASSIGNMENT 5: DEMONSTRATION OF REDEFINES AND RENAMES CLAUSES ............................................. 45
ASSIGNMENT 6: UNDERSTANDING STRING HANDLING VERBS .............................................................. 48
ASSIGNMENT 7: EXERCISES FOR SELF REVIEW ............................................................................. 49
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Context This document contains assignments to be completed as part of the hands on for the subject COBOL Programming (Course code: LA01).
Note: In order to complete the course, assignments in this document must be completed in
the sequence mentioned.
Day 1 Assignments
Assignments which are not followed naming conventions will not be evaluated and will be assumed as Incomplete.
Assignment 1: Writing a COBOL Code in the Coding Sheet, Executing and Viewing the output in spool
Objective: To learn how to write a COBOL program in the coding sheet, execute it using a JCL and viewing the output in spool Problem Description: Write a COBOL program to display the message HELLO WORLD onto the spool. Execute the program through JCL. Estimated time: 10 mins. Step: Play the video file Compile in the DEMOS folder Type the program and execute the same.
Summary of this assignment:
How to write a simple COBOL program
How to view the data in the spool
Note: Naming Convention to be followed for Day 1 Assignment 1
PDS : TXXXXX.COBOL.DAY1.ASSIGN.PDS Member for COBOL program : TXXXCB01, where XXX is last 3 digits of your
employee id
Member for JCL : TXXXJC01
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Assignment 2: Debugging a COBOL program
Objective: To learn how to debug a COBOL program and interpret the JES messages in the spool Problem Description: Few errors have been introduced in the program of Assignment 1. We will execute this program through JCL and interpret the error messages in the spool Estimated time: 10 mins. Step : Play the video file Debug in the DEMOS folder Type the program and execute the same.
Summary of this assignment:
In this exercise, you have learnt :
How to debug a COBOL program
How to interpret the error messages in the spool
Note: Naming Convention to be followed for Day 1 Assignment 2
PDS : TXXXXX.COBOL.DAY1.ASSIGN.PDS Member for COBOL program : TXXXCB02, where XXX is last 3 digits of your
employee id
Member for JCL : TXXXJC02
Assignment 3: Understanding COBOL Coding Standards
Objective: To learn how to write a COBOL program according to Infosys Coding Standards Problem Description: Refer the reference document provided for coding standards and implement the HELLOW WORLD program with coding standards.
Note: From here on wards, for all the programs, follow the coding standards.
Estimated time: 30 mins.
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Summary of this assignment:
In this exercise, you have learnt:
How to write a COBOL program according to Infosys coding standards
Note: Naming Convention to be followed for Day 1 Assignment 3
PDS : TXXXXX.COBOL.DAY1.ASSIGN.PDS Member for COBOL program : TXXXCB03, where XXX is last 3 digits of your
employee id
Member for JCL : TXXXJC03
Assignment 4: Understanding Arithmetic Statements in COBOL
Objective: To understand the usage of arithmetic statements in COBOL Problem Description:
Write a COBOL program to evaluate the following expressions using arithmetic verbs ADD, SUBTRACT, MULTIPLY and DIVIDE
V = (4/3 ) r3
P = 2 * (l + b) R = (a + b) 2 * (a b)2
Assume the values of a, b, r and l of your own
Accept the values of a, b, r and l through JCL
Write a JCL to execute the program and display the result in the spool
Estimated time: 30 mins Summary of this assignment:
In this exercise, you have learnt : How to use the different forms of arithmetic verbs in a COBOL program
Note: Naming Convention to be followed for Day 1 Assignment 4
PDS : TXXXXX.COBOL.DAY1.ASSIGN.PDS
Member for COBOL program : TXXXCB04, where XXX is last 3 digits of your employee id
Member for JCL : TXXXJC04
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Assignment 5: Understanding Edited Picture Clauses and MOVE Verb
Objective: To understand the use of Edited Picture Clauses in COBOL Problem Description:
PICTURE clause of the Sending fields and Receiving fields are given in the below table
along with the contents being moved to them. Initialize the sending fields using move statements
Use Move statements from sending field to receiving field.
Sending Field (PIC) Contents Receiving Field (PIC) Output
9(5)V99 0023456 $**,**.99 $*2,34.56
9(3)V99 01234 $***.99 $*12.34
9(4)V99 000382 $Z,ZZZ.99 $ 3.82
9(3)V99 00005 $ZZZ.99 $ .05
9(4)V9 381234 $9,999.99 $3,812.34
9(3)V99 00827 Z(3) 8
9(3) 018 Z(3).ZZ 18.00
9(3) 027 Z(3).99 27.00
S999 -459 -999 -459
S999 -493 99- 93-
9999 9143 -9999 b9143(b for blank )
S9999 -9526 +9(4) -9526
S9(4)V99 -038725 +Z,ZZZ.99 -bb387.25(b for blank)
S9(3) -456 9(3)CR 456CR
S9(6) +459342 9(6)CR 459342bb
9(9) 089743456 999BB99BB9999 089 74 3456
X(10) PASMITH XBXBX(8) P A SMITH
999 153 99900 15300
Write a COBOL program to verify the output in the receiving fields . Refer to the document Edited Picture Clause Rules in the Reference Documents
folder under DEMOS for the rules to be used Write a JCL to execute the program
Estimated time: 60 mins Summary of this assignment:
In this exercise, you have learnt :
How to use Edited Picture Clauses
How to use MOVE Verb
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Note: Naming Convention to be followed for Day 1 Assignment 5
PDS : TXXXXX.COBOL.DAY1.ASSIGN.PDS
Member for COBOL program : TXXXCB05, where XXX is last 3 digits of your employee id
Member for JCL : TXXXJC05
Assignment 6: Understanding the LEGAL MOVES in COBOL
Objective: To understand the Legal MOVE Matrix for various data types Problem Description:
Declare WORKING-STORAGE Variables of the following data types : Numeric Alphabetic Alphanumeric Numeric Non-integer (decimal with PIC symbol V) Edited Numeric Edited Alphanumeric
Using MOVE statements validate the Matrix given below for the compatibility of data types.
Data Types Alphabetic Alphanumeric Edited Alphanumeric
Numeric Numeric non integer
Edited numeric
Alphabetic Y Y Y N N N
Alphanumeric Y Y Y Y* N N
Edited Alphanumeric
Y Y Y N N N
Numeric N Y Y Y Y Y
Numeric non integer
N N N Y Y Y
Edited numeric
N Y Y Y Y Y
Write a JCL to execute the program. Observe the results for compatible moves (Y) and error messages for incompatible moves (N)
Estimated time: 45 mins Summary of this assignment:
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In this exercise, you have learnt :
How to perform compatible moves in COBOL
Note: Naming Convention to be followed for Day 1 Assignment 6
PDS : TXXXXX.COBOL.DAY1.ASSIGN.PDS Member for COBOL program : TXXXCB06, where XXX is last 3 digits of your
employee id
Member for JCL : TXXXJC06
Assignment 7: Exercises for Self Review
1. What are the different data types available in COBOL?
2. Give the syntax of the DIVISION Verb to store the REMAINDER and the Quotient 3. What is the use of GIVING clause in Arithmetic statements?
4. What is the use of JUSTIFIED clause in a alphabetic MOVE statement?
Day 2 Assignments
Assignments which are not followed naming conventions will not be evaluated and will be assumed as Incomplete.
Assignment 1: Demonstration of ON SIZE ERROR Clause
Objective: To learn how to use the ON SIZE ERROR Clause with arithmetic verbs for accurate results Background: ON SIZE ERROR clause is used in the arithmetic statements to capture the kind of errors where in the destination is too small to accommodate the result. ON SIZE ERROR would be effective only for the digits before the decimal point. In case of the digits after the decimal point, ROUNDED clause has to be used. Estimated time: 30 mins.
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Note: Naming Convention to be followed for Day 2 Assignment 1
PDS : TXXXXX.COBOL.DAY2.ASSIGN.PDS
Member for COBOL program : TXXXCB01, where XXX is last 3 digits of your
employee id Member for JCL : TXXXJC01
Step 1: Code the below given program in a member TXXXCB01 in PDS TXXXXX.COBOL.DAY2.ASSIGN.PDS
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Step 2: Save and compile the program using TRNGCOB
Step 3: Code the below given JCL in a member TXXXJC01 in PDS TXXXXX.COBOL.DAY2.ASSIGN.PDS
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Step 4: Save and submit the JCL
Step 5: Observe the output in the spool
Summary of this assignment:
How to use ON SIZE ERROR clause to handle precision errors in arithmetic verbs
Assignment 2: Understanding PERFORM..UNTIL Verb
Objective: To learn how to use the PERFORM..UNTIL Verb as an iteration construct in COBOL Background: PERFORMUNTIL is an iteration construct available in COBOL to repeat a set of statements until the condition is satisfied. It has two kinds of testing done before the body of the loop gets executed:
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WITH TEST BEFORE : the condition is tested before the body of the loop is executed even once
WITH TEST AFTER : the condition is tested after the body of the loop is executed once
Estimated time: 30 mins
Note: Naming Convention to be followed for Day 2 Assignment 2
PDS : TXXXXX.COBOL.DAY2.ASSIGN.PDS
Member for COBOL program : TXXXCB02, where XXX is last 3 digits of your employee id
Member for JCL : TXXXJC02
Step 1: Code the below given program in a member TXXXCB02 in PDS TXXXXX.COBOL.DAY2.ASSIGN.PDS
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Step 2: Save and compile the program using TRNGCOB
Step 3: Code the below given JCL in a member TXXXJC02 in PDS TXXXXX.COBOL.DAY2.ASSIGN.PDS
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Step 4: Save and submit the JCL Step 5: Observe the output in the spool Summary of this assignment:
How to use PERFORM..UNTIL Verb as an iteration construct
Assignment 3: Generation of Pay Slip of an employee using arithmetic verbs, ROUNDED and ON SIZE ERROR clauses
Objective: To learn how to use arithmetic verbs, ROUNDED and ON SIZE ERROR clauses to provide results with accurate precision Problem Description:
Accept the Basic Salary and HRA from user
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Calculate the DA as 12% of Basic Salary
Calculate the Gross as Basic + DA + HRA Use Rounded and ON SIZE ERROR for correct results
Use edited Picture Clauses for display wherever necessary.
Display the pay slip as below format:
Infosys Technologies Limited
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Paybill for the month of
Emp. No : 8900
Emp. Name : Shastry
Basic : Rs.xxxx.xx DA : Rs.xxx.xx
HRA : Rs.xxx.xx
Gross : Rs.xxxxx.xx
Estimated time: 40 mins Summary of this assignment:
How to use arithmetic verbs, ROUNDED and ON SIZE ERROR clauses in COBOL program
Note: Naming Convention to be followed for Day 2 Assignment 3
PDS : TXXXXX.COBOL.DAY2.ASSIGN.PDS
Member for COBOL program : TXXXCB03, where XXX is last 3 digits of your
employee id Member for JCL : TXXXJC03
Assignment 4: Generating Grade Sheets of students using PERFORM Verbs and IF..THENELSE
Objective: To learn how to use various forms of PERFORM Verbs and IF statements Problem Description: Write a COBOL program to create Grade sheets for 2 students in a college.
Accept the name of the student and marks in 3 subjects for every student from the
user.
Calculate the Total, Percentage and Grade for 2 students.
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Code every functionality (ACCEPT, calculating Total, percentage & grade and display)
in separate paragraphs. Use PERFORM . THRU to execute the paragraphs in sequence for each student
Use PERFORM..TIMES to repeat the loop for 2 students
Use the following criterion to assign grades based on their Percentage marks
Percentage Grade
>=80 A
70 to 79 B
60 to 69 C
50 to 59 D
< 50 E
Use IF.THENELSE to check for grades
Display the Grade Sheet in the following format : ------------------------------------------------------------------------------------------------------
* Mysore University *
* Student Name : XXXXXXXXXXXX *
------------------------------------------------------------------------------------------------------
Subject Marks
-----------------------------------------------------------
CHSSC 90
PF 90
RDBMS 90
-----------------------------------------------------------
TOTAL 270
-----------------------------------------------------------
Percentage 90%
------------------------------------------------------------------------------------------------------
GRADE OBTAINED A
------------------------------------------------------------------------------------------------------
Estimated time: 40 mins Summary of this assignment:
How to use PERFORM Verbs and IF statements
Note: Naming Convention to be followed for Day 2 Assignment 4
PDS : TXXXXX.COBOL.DAY2.ASSIGN.PDS
Member for COBOL program : TXXXCB04, where XXX is last 3 digits of your
employee id Member for JCL : TXXXJC04
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Assignment 5: Using PERFORM.UNTIL Verb to accept choice from user and display the output
Objective: To learn how to accept the input from the user and perform the display according to the input Problem Description:
Accept CHOICE from the user (y/n)
Accept the NAME, IBU from the user
Use PERFORM UNTIL to repeat the loop where the loop has to terminate whenever the user enters N for CHOICE
Display the data in spool
Estimated time: 20 mins Summary of this assignment:
How to use accept the inputs from the user and display it on the spool using
PERFORM.UNTIL verb
Note: Naming Convention to be followed for Day 2 Assignment 5
PDS : TXXXXX.COBOL.DAY2.ASSIGN.PDS
Member for COBOL program : TXXXCB05, where XXX is last 3 digits of your employee id
Member for JCL : TXXXJC05
Assignment 6: Using PERFORM.VARYING to generate N elements of Fibonacci Series
Objective: To learn how to use PERFORMVARYING Verb to generate Fibonacci series Problem Description:
Accept No. of elements N to be generated in a WORKING-STORAGE VARIABLE
Use PERFORM..VARYING to generate the series
Estimated time: 20 mins Summary of this assignment:
How to use PERFORMVARYING Verb
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Note: Naming Convention to be followed for Day 2 Assignment 6
PDS : TXXXXX.COBOL.DAY2.ASSIGN.PDS
Member for COBOL program : TXXXCB06, where XXX is last 3 digits of your
employee id Member for JCL : TXXXJC06
Assignment 7: Exercises for Self Review
1. What is the difference between PERFORMWITH TEST BEFORE and WITH TEST AFTER? 2. When coded in a COBOL program what does STOP RUN do?
3. What are condition names and condition variables?
4. List down the level numbers used for condition variables and condition names 5. Give the syntax of PERFORMVARYING statement
Day 3 Assignments
Assignments which are not followed naming conventions will not be evaluated and will be assumed as Incomplete.
Assignment 1: Creation of PS file and understanding the Read Operation of a PS file
Objective: To learn how to create a PS data file for read, write and update operations Step 1:
Create a sequential file to store the Employee Records in an organization. The record
layout is as follows : EMPNUM PIC 9(5).
EMPNAME PIC X(25)
DESGINATION PIC A(10)
IBU PIC A(10)
TELEPHONE PIC 9(7)
Note: Naming Convention to be followed for Day 3 Assignment 1
PS : TXXXXX.COBOL.DAY3.ASSIGN.PS
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Populate the PS file with 5 sample records according to the above layout Problem Description:
Develop a COBOL program to read the records from the PS file created in step1 (TXXXXX.COBOL.DAY3.ASSIGN.PS) [ Refer to demo T115COB1,T115JCL1]
Display the records onto the spool
Handle appropriate error conditions
Estimated time: 55 mins. Summary of this assignment:
How to read the records from a PS file and display them on the spool
Note: Naming Convention to be followed for Day 3 Assignment 1
PDS : TXXXXX.COBOL.DAY3.ASSIGN.PDS
Member for COBOL program : TXXXCB01, where XXX is last 3 digits of your
employee id Member for JCL : TXXXJC01
Assignment 2: Understanding Write operation of a PS file
Objective: To learn how to insert records to a PS file Problem Description:
Accept the records to be inserted through the JCL [ Refer to demo T115COB1,T115JCL1]
Develop a COBOL program to read the records from the JCL and write it into the PS
file Display successfully written in the spool, if the write is successful
Handle appropriate error conditions
Estimated time: 40 mins.
Summary of this assignment:
How to insert the records to a PS file
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Note: Naming Convention to be followed for Day 3 Assignment 2
PS to be used : TXXXXX.COBOL.DAY3.ASSIGN.PS (created in step1 of
assignment 1)
PDS : TXXXXX.COBOL.DAY3.ASSIGN.PDS Member for COBOL program : TXXXCB02, where XXX is last 3 digits of your
employee id
Member for JCL : TXXXJC02
Assignment 3: Appending records to a PS file
Objective: To learn how to append records to the PS file Problem Description:
Accept 2 records to be appended to the file through the JCL
Develop a COBOL program to read the records from the JCL and append it to the PS
file Display successfully appended in the spool, if the write is successful
Handle appropriate error conditions
Estimated time: 10 mins Summary of this assignment:
How to append the records to a PS file
Note: Naming Convention to be followed for Day 3 Assignment 3
PS to be used : TXXXXX.COBOL.DAY3.ASSIGN.PS (created in step1 of
assignment 1) PDS : TXXXXX.COBOL.DAY3.ASSIGN.PDS
Member for COBOL program : TXXXCB03, where XXX is last 3 digits of your
employee id Member for JCL : TXXXJC03
Assignment 4: Updating records in a PS file
Objective: To learn how to update a record in a PS file Problem Description:
Accept a Telephone Number of an employee from JCL
Develop a COBOL program to update the IBU of the employee who is having that
telephone number, as IHLD Display successfully updated in the spool, if the update is successful
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Handle appropriate error conditions
Estimated time: 45 mins. Summary of this assignment:
How to update a record in a PS file
Note: Naming Convention to be followed for Day 3 Assignment 4
PS to be used : TXXXXX.COBOL.DAY3.ASSIGN.PS (created in step1 of assignment 1)
PDS : TXXXXX.COBOL.DAY3.ASSIGN.PDS
Member for COBOL program : TXXXCB04, where XXX is last 3 digits of your employee id
Member for JCL : TXXXJC04
Assignment 5: Understanding Sequential File manipulations
Objective: To learn how to manipulate the transaction records in a PS file Problem Description: Master PS file contains the data records. Transaction PS file contains the transaction records to be inserted/updated/deleted, to/from a master file. A batch program SEQPROC reads the transaction PS file and according to the flag I (Insert), U (Update) and D (delete) performs the necessary operations in the master PS file. Step 1 : Create a PS master file TXXXXX.COBOL.DAY3.ASSGIN5.PS1 with following structure and insert 2 records.
01 MASTER-REC. 05 MASTER-EMP-NO PIC 9(5).
05 FILLER PIC X.
05 MASTER-EMP-NAME PIC X(25). 05 FILLER PIC X.
05 MASTER-EMP-STATUS PIC X(1).
05 FILLER PIC X(47). Step 2 : Create a PS transaction file TXXXXX.COBOL.DAY3.ASSIGN5.PS2 with following structure and insert 6 sample records. (2 for each transaction) 01 TRANS-REC.
05 TRANS-FLAG PIC X(1).
05 FILLER PIC X.
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05 TRANS-EMP-NO PIC 9(5).
05 FILLER PIC X. 05 TRANS-EMP-NAME PIC X(25).
05 FILLER PIC X(47). Step 3 : Write the given COBOL program in the member TXXXCB05 and JCL to execute program in member TXXXJC05 in PDS TXXXXX.COBOL.DAY4.ASSIGN.PDS Refer to SEQPROC and JCLSEQP in the demos. Step 4: Submit the JCL and observe the spool
Estimated time: 60 mins Summary of this assignment:
How to manipulate PS file through a batch program
Note: Naming Convention to be followed for Day 3 Assignment 5
PS Master file : TXXXXX.COBOL.DAY3.ASSIGN5.PS1 PS Transaction file : TXXXXX.COBOL.DAY3.ASSIGN5.PS2
PDS : TXXXXX.COBOL.DAY3.ASSIGN.PDS
Member for COBOL program : TXXXCB05, where XXX is last 3 digits of your employee id
Member for JCL : TXXXJC05
Assignment 6: Exercises for Self Review
1. In which mode do we open a PS file to append the records?
2. Give the syntax of REWRITE and DELETE statements in a PS file
3. What is the use of RECORD BUFFERS while using files in COBOL? 4. Given below the details of a PS file , code the ENVIRONMENT DIVISION entries (SELECT
STATEMENT along with FILE STATUS)
Physical File name : DOCFILE Logical File name : USRFILE
File Status variable : WS-FS
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Day 4 Assignments
Assignments which are not followed naming conventions will not be evaluated and will be assumed as Incomplete.
Assignment 1: Understanding READ and WRITE operations in a VSAM KSDS file
Objective: To learn how to perform READ and WRITE operation in a VSAM KSDS file Problem Description:
Create a VSAM KSDS file TXXXXX.COBOL.DAY4.ASSIGN1.VSAM with the following
record layout :
REGNO PIC X(05) (KEY FIELD)
NAME PIC A(15)
AGE PIC 9(02)
Insert the following two records into VSAM file
10000 ANITHA KUMAR 20
10002 SUSHEEL SHARMA 21
Step 1: Code the following program in a member TXXXCB01 in PDS TXXXXX.COBOL.DAY4.ASSIGN.PDS
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Step 2: Save and compile the program using TRNGCOB Step 3: Code the following JCL in a member TXXXJC01 in PDS TXXXXX.COBOL.DAY4.ASSIGN.PDS
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Step 4: Save and submit the JCL Step 5: Observe the output in the spool. Open the VSAM file and view the inserted records Estimated time: 60 mins. Summary of this assignment:
How to perform read and write operations in a VSAM KSDS file
Note: Naming Convention to be followed for Day 4 Assignment 1
VSAM : TXXXXX.COBOL.DAY4.ASSIGN1.VSAM
PDS : TXXXXX.COBOL.DAY4.ASSIGN.PDS
Member for COBOL program : TXXXCB01, where XXX is last 3 digits of your employee id
Member for JCL : TXXXJC01
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Assignment 2: Understanding the VSAM KSDS file Manipulations
Objective: To learn how to perform updation and deletion in a VSAM KSDS file Problem Description: Create a VSAM KSDS file TXXXXX.COBOL.DAY4.ASSIGN2.VSAM through File-Aid with the following record layout :
DEPT NUM PIC X(5) [KEY FIELD]
DEPTNAME PIC A(15)
DEPTLOC PIC A(10)
(i) Insertion
Write a COBOL program in a member TXXXCB02 to read the records from
the JCL and insert it into the VSAM (XXX is last 3 digits of your employee id) Execute the program using JCL TXXXJC02
(ii) Read
Write a COBOL program in a member TXXXCB03 to read the records from the VSAM and display it onto the spool
Execute the program using JCL- TXXXJC03
(iii) Update
Write a COBOL program in a member TXXXCB04 to
o Accept the Department Number from JCL
o Update the Location of that record to MYSORE Execute the program using JCL TXXXJC04
(iv) Delete
Write a COBOL program in a member TXXXCB05 to o Accept the Department Number from JCL
o Delete the record from the VSAM
Execute the program using JCL TXXXJC05 Estimated time: 60 mins. Summary of this assignment:
How to read the records from a PS file and display them on the spool
Note: Naming Convention to be followed for Day 4 Assignment 2
VSAM KSDS file : TXXXXX.COBOL.DAY4.ASSIGN2.VSAM
PDS : TXXXXX.COBOL.DAY4.ASSIGN.PDS
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Assignment 3: Understanding COPY Verb
Objective: To learn how to create Copybooks and use them in the program through COPY Verb Problem Description: Copybooks created should have a unique name. The copybooks are stored in the copy library OPERN.CICS1.COPYLIB Step 1: Open the member TXXXCB03 of Assignment 2 in PDS TXXXXX.COBOL.DAY4.ASSIGN.PDS
Step 2 : Type CC-CC-CREATE for the FD entry and press ENTER. The following screen will appear
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Step 3 : Type the path of the copybook to be stored with the copybook name. Here the path is OPERN.CICS3.COPYLIB(TXXXCPY1), where XXX is last 3 digits of your mainframe id. Press ENTER. Step 4 : The message Member TXXCPY1 created will appear in the right top corner of the screen.
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Step 5 : In the member TXXXCB03 , delete the FD entry and replace it with the copybook.
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Step 6: Save the program and compile using TRNGCOB Step 7: Execute the same through TXXXJC03 Estimated time: 30 mins. Summary of this assignment:
How to create Copybooks and use them in the program
Note: OPERN.CICS1.COPYLIB has to be opened only in VIEW mode to view the
contents
Copybook name : TXXXCPY1
Member to be used : TXXXCB03, where XXX is last 3 digits of your employee id
Member to be used : TXXXJC03
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Assignment 4 : Understanding CALL Verb
Objective: To learn how to use CALL Verb to create modular programs Step 1 : Code the following program in a member TXXXCB06
Step 3 : Save the program and compile using TRNGCOB Step 4 : Create a member TXXXCB07 in PDS TXXXXX.COBOL.DAY4.ASSIGN.PDS Step 5 : Code the following program
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Step 6 : Save the program and compile using TRNGCOB Step 7: Create a member TXXXJC06 in PDS TXXXXX.COBOL.DAY4.ASSIGN.PDS Step 8: Code the following JCL
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Step 9: Save and submit the JCL Step 10: Observe the output in the spool Estimated time: 30 mins. Summary of this assignment:
How to use CALL Verbs to create modular programs
Note: Naming Convention to be followed for Day 4 Assignment 4
PDS : TXXXXX.COBOL.DAY4.ASSIGN.PDS Member for COBOL main program : TXXXCB06
Member for COBOL sub-program : TXXXCB07, where XXX is last 3 digits of
your employee id Member for JCL : TXXXJC06
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Assignment 5: Creation of Modular COBOL programs
Objective: To learn how to create modular programs using CALL verb and how to include copybooks Problem Description: Convert the Assignment 2 as a menu driven program with modularity
Declare a WORKING-STORAGE variable WS-CHOICE to store the users choice.
Write a Main Program that will accept the choice. The choice has to be provided through JCL.
Use COPY verb to declare the FD entries for the VSAM file In the main program,
If Choice = 1 Call the program TXXXCB02. Use CALL Verb.
If Choice = 2 Call the program TXXXCB03. Use CALL Verb and pass the RECORD Key through CALL statement from the main program If Choice = 3 Call the program TXXXCB04. Use CALL Verb and pass the Department name through the CALL statement from the main program
Implement appropriate error handling for file
Estimated time: 45 mins. Summary of this assignment:
How to create modular programs through CALL verb
How to use COPY books
Note: Naming Convention to be followed for Day 4 Assignment 5
PDS : TXXXXX.COBOL.DAY4.ASSIGN.PDS
VSAM : TXXXXX.COBOL.DAY4.ASSIGN2.VSAM (same file created in Assignment 2) Member for COBOL program : TXXXCB08, where XXX is last 3 digits of
employee id
Member for JCL : TXXXJC08 Members to be used : TXXXCB03, TXXXCB04, TXXXCB05 (in Assignment 2)
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Assignment 6: Understanding VSAM KSDS File and PS File manipulations
Objective: To learn how to manipulate the transaction records in a PS file and update the master VSAM KSDS file Problem Description : Master PS file contains the transaction records that are to be updated in the VSAM KSDS master file. Transaction PS file contains the transaction records to be inserted/updated/deleted in a master file. A batch program VSAMPROC reads the transaction PS file and according to the flag I (Insert), U (Update) and D (delete) performs the necessary operations in the master VSAM KSDS file. Step 1 : Create a PS transaction file TXXXXX.COBOL.DAY4.ASSGN6.PS with data Step 2 : Create a VSAM KSDS file TXXXXX.COBOL.DAY4.ASSGN6.VSAM Step 3 : Write the given COBOL program in the member TXXXCB09 and JCL to execute program in member TXXXJC09 in PDS TXXXXX.COBOL.DAY4.ASSIGN.PDS
Refer the Demos VSAMPROC, JCLVSAM. Step 4 : Submit the JCL and observe the spool output Estimated time: 50 mins. Summary of this assignment:
How to read the records from a transaction PS file and update the same in the VSAM
KSDS master file
Note: Naming Convention to be followed for Day 4 Assignment 6
PS Master file : TXXXXX.COBOL.DAY4.ASSGN6.PS
VSAM KSDS file : TXXXXX.COBOL.DAY4.ASSGN6.VSAM
PDS : TXXXXX.COBOL.DAY4.ASSIGN.PDS Member for COBOL program : TXXXCB09, where XXX is last 3 digits of
employee id
Member for JCL : TXXXJC09
Assignment 7: Creation of Alternate Index for a VSAM KSDS file
Objective: To learn how to create an alternate index for a VSAM KSDS file
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Background : Alternate Indexes are used in VSAM files for searching operations. Besides primary key field, any other field can be an alternate key (preferably numeric field). Unlike primary key field, alternate key can have duplicate values. Estimated time: 20 mins. Step : Play the media file Alternate Index
Summary of this assignment:
How to create an alternate index for a VSAM file and use it in a COBOL program
Assignment 8: Exercises for Self Review
1. Give the syntax of SELECT statement for a VSAM with ALTERNATE INDEX 2. What is the use of FD entries in ENVIRONMENT division?
3. In the below given SELECT statement identify the physical and logical filenames ;
ENVIRONMENT DIVISION. INPUT-OUTPUT SECTION.
FILE-CONTROL.
SELECT EMPFILE ASSIGN TO QSFILE ORGANIZATION IS INDEXED
ACCESS IS RANDOM.
4. Which PDS is used to store the copybooks created by TSO users? 5. What is the use of LINKAGE SECTION while using CALL statement?
Day 5 Assignments
Assignments which are not followed naming conventions will not be evaluated and will be assumed as Incomplete.
Assignment 1: Demonstration of One Dimensional Array
Objective: To learn how to create an one dimensional array and populate it with data Step 1 : Code the following program in a member TXXXCB01 in PDS TXXXXX.COBOL.DAY5.ASSIGN.PDS
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Step 3 : Save the program and compile using TRNGCOB Step 4 : Create a member TXXXJC01 in PDS TXXXXX.COBOL.DAY5.ASSIGN.PDS Step 5 : Write a JCL to execute the program TXXXJC01 Step 6 Save and submit the JCL Step 7 Observe the output in the spool Estimated time: 30 mins. Summary of this assignment:
How to create one dimensional array and populate them with data
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Note: Naming Convention to be followed for Day 5 - Assignment 1
PDS : TXXXXX.COBOL.DAY5.ASSIGN.PDS
Member for COBOL program : TXXXCB01, where XXX is last 3 digits of
employee id Member for JCL : TXXXJC01
Assignment 2: Demonstration of STRING and UNSTRING Verb
Objective: To learn how to perform string manipulations using STRING and UNSTRING Verbs Background: STRING Verb is used in COBOL to concatenate separate strings into one string. UNSTRING verb is used to split a string into various elementary strings Step 1 : Code the following program in a member TXXXCB02
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Step 2 : Save the program and compile using TRNGCOB Step 3 : Write a JCL to execute the program in a member TXXXJC02 Step 4 : Save and submit the JCL Step 5 : Observe the output in the spool Estimated time: 20 mins. Summary of this assignment:
How to concatenate strings using STRING Verb and split the strings using UNSTRING Verb
Note: Naming Convention to be followed for Day 5 - Assignment 2
PDS : TXXXXX.COBOL.DAY5.ASSIGN.PDS
Member for COBOL program : TXXXCB02, where XXX is last 3 digits of employee id
Member for JCL : TXXXJC02
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Assignment 3: Demonstration of INSPECT Verb
Objective: To learn how to perform string manipulations using INSPECT Verb Background: INSPECT Verb can do various functions like :
Counting the number of characters in a string Replacing a pattern of characters into another pattern between characters
The various modifying phrases used with INSPECT are : LEADING inspects the position of a character FIRST inspects the first occurrence of a character
Step 1: Code the following program in a member TXXXCB03 in PDS TXXXXX.COBOL.DAY5.ASSIGN.PDS
Step 2 : Save the program and compile using TRNGCOB Step 3 : Write a JCL to execute the program in a member TXXXJC03
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Step 4 : Save and submit the JCL Step 5 : Observe the output in the spool Estimated time: 30 mins. Summary of this assignment:
How to use INSPECT Verb for counting the number of characters in a string and
replacing the characters
Note: Naming Convention to be followed for Day 5 - Assignment 3
PDS : TXXXXX.COBOL.DAY5.ASSIGN.PDS Member for COBOL program : TXXXCB03, where XXX is last 3 digits of
employee id
Member for JCL : TXXXJC03
Assignment 4: Demonstration of SEARCH ALL Verb
Objective: To learn how to search for an element in a table Background: SEARCH Verb is used to search an element in an array. Two types of search can be performed on an array :
Linear Search Binary Search
COBOL provides different verbs for both the searches. SEARCH performs a linear search on a table to find an element. SEARCH ALL performs a binary search on a table to find an element Step 1 : Code the following program in a member TXXXCB04 in PDS TXXXXX.COBOL.DAY5.ASSIGN.PDS
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Step 2 : Save the program and compile using TRNGCOB Step 3 : Code the following JCL in a member TXXXJC04
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Step 4 : Save and submit the JCL Step 5 : Observe the output in the spool Estimated time: 30 mins. Summary of this assignment:
How to use SEARCH ALL Verb to perform a binary search on a table
Note: Naming Convention to be followed for Day 5 - Assignment 4
PDS : TXXXXX.COBOL.DAY5.ASSIGN.PDS
Member for COBOL program : TXXXCB04, where XXX is last 3 digits of employee id
Member for JCL : TXXXJC04
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Assignment 5: Demonstration of REDEFINES and RENAMES Clauses
Objective: To learn how to use REDEFINES and RENAMES clauses Background: COBOL provides a way for reusability of code through certain programming clauses. REDEFINES can be used to provide a new name for an existing memory declaration. RENAMES can be used to create a new group out of the existing group items Step 1 : Code the following program in a member TXXXCB05 of PDS TXXXXX.COBOL.DAY5.ASSIGN.PDS
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Step 2 : Save the program and compile using TRNGCOB Step 3 : Code the following JCL in a member TXXXJC05
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Step 4 : Save and submit the JCL Step 5 : Observe the output in the spool Estimated time: 30 mins. Summary of this assignment:
How to use RENAMES and REDEFINES Clauses in a COBOL program
Note: Naming Convention to be followed for Day 5 - Assignment 5
PDS : TXXXXX.COBOL.DAY5.ASSIGN.PDS
Member for COBOL program : TXXXCB05, where XXX is last 3 digits of employee id
Member for JCL : TXXXJC05
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Assignment 6: Understanding String Handling Verbs
Objective: To learn how to use the various string handling verbs Problem Description:
Develop a modular COBOL program to perform the following string handling functions using INSPECT, STRING and UNSTRING
Every functionality has to be defined in separate paragraphs Each paragraph has to be called through PERFORM statement from the main paragraph
Declare a string with value EDUCATION AND RESEARCH Use INSPECT Verb to :
o Count the number of occurrences of A and E in the string o Replace the character 'A' by 'Z' before the first occurrence of O. o Replace all the characters 'E' by 'M' occurring before 'D'.
Declare 3 strings with values and PICTURE Clauses as shown below : Mainframes PIC A(20)
Supports PIC A(12)
Virtual Storage PIC A(30)
Use STRING Verb with POINTER and OVERFLOW option to display the following strings in spool :
Mainframes Supports Virtual Storage
*********Mainframes Supports virtual storage
(* denotes blanks)
Declare a string with value Corporate Training Center - Infosys Technologies Limited, Mysore
Use UNSTRING Verb to display the following strings in spool : Corporate Training Center
Infosys Technologies Limited
Mysore
Estimated time: 60 mins. Summary of this assignment:
How to use STRING and UNSTRING Verbs to concatenate and split the strings How to use INSPECT verb to count the number of occurrence of the character and to
replace characters in a given string
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Note: Naming Convention to be followed for Day 5 Assignment 6
PDS : TXXXXX.COBOL.DAY5.ASSIGN.PDS
Member for COBOL program : TXXXCB06, where XXX is last 3 digits of employee
id Member for JCL : TXXXJC06
Assignment 7: Exercises for Self Review
1. What is the difference between the LEADING and FIRST phrase used with the INSPECT
statement? 2. Predict the output of the following code snippet
IDENTIFICATION DIVISION.
PROGRAM-ID. NEWSTR. DATA DIVISION.
WORKING-STORAGE SECTION.
01 WS-FSTR PIC X(20). 01 WS-SSTR PIC X(35).
01 WS-TSTR PIC X(15).
PROCEDURE DIVISION. A000-MAIN-PARA.
MOVE INFOSYS LIMITED TO WS-FSTR
MOVE MYSORE TO WS-SSTR STRING WS-FSTR, WS-SSTR INTO WS-TSTR
DISPLAY WS-TSTR
STOP RUN. 3. What is the value of WS-COUNT in the following INSPECT statement
IDENTIFICATION DIVISION.
PROGRAM-ID. NEWSTR1. DATA DIVISION.
WORKING-STORAGE SECTION.
01 WS-FSTR PIC X(20). 01 WS-COUNT PIC 9(03).
PROCEDURE DIVISION.
A000-MAIN-PARA. MOVE GEC INFOSYS MYSORE TO WS-FSTR
INSPECT WS-FSTR TALLYING WS-COUNT FOR ALL E
DISPLAY WS-COUNT STOP RUN.
4. What is the use of OVERFLOW and POINTER clause in STRING and UNSTRING statements?
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