Structured COBOL: An Introduction

Front Matter....Pages i-ix
Introduction to Computers....Pages 1-1
Introduction to Computers (2)....Pages 2-2
Introduction to Programming....Pages 3-3
Programming in COBOL....Pages 4-4
Structure of a COBOL Program....Pages 5-5
Layout of a COBOL Program....Pages 6-6
Vocabulary....Pages 7-7
Reserved Words....Pages 8-9
The Data Division....Pages 10-10
The Data Division (level numbers)....Pages 11-11
Revision Test....Pages 12-12
The Procedure Division....Pages 13-13
Introduction to Program Design....Pages 14-15
Arithmetic using COMPUTE....Pages 16-16
Arithmetic using ADD, SUBTRACT, MULTIPLY and DIVIDE....Pages 17-17
Using Signed Numbers....Pages 18-18
Using Decimal Fractions....Pages 19-19
Using ROUNDED....Pages 20-20
Using MOVE (1)....Pages 21-21
Using MOVE (2)....Pages 22-22
Revision Test....Pages 23-23
Using PERFORM....Pages 24-24
Program Design using Structure Diagrams (Sequences)....Pages 25-25
Program Design — Coding from Structure Diagrams (Sequences)....Pages 26-28
Repetition using PERFORM..TIMES....Pages 29-29
Repetition using PERFORM.. UNTIL....Pages 30-30
Program Design using Structure Diagrams (Iteration)....Pages 31-31
Program Design — Coding from Structure Diagrams (Iteration)....Pages 32-32
Program Design using Structure Diagrams (Problems involving Iteration and Sequences)....Pages 33-35
Program Design — Coding from Structure Diagrams (Problems involving Iteration and Sequences)....Pages 36-38
Using IF.. ELSE (1)....Pages 39-39
Using IF.. ELSE (2)....Pages 40-40
Using EVALUATE (1)....Pages 41-41
Using EVALUATE (2)....Pages 42-42
Program Design using Structure Diagrams (Selection)....Pages 43-44
Program Design — Coding from a Structure Diagram (Selection)....Pages 45-46
Program Design — using Structure Diagrams (Problems involving Sequences and Selection)....Pages 47-47
Program Design — Coding from Structure Diagrams (Problems involving Sequences and Selection)....Pages 48-49
Program Design — using Structure Diagrams (Problems involving Sequences, Iteration and Selection)....Pages 50-51
Using In-line PERFORM....Pages 52-52
Using PERFORM .. WITH TEST AFTER....Pages 53-53
Revision Test....Pages 54-54
Using Files....Pages 55-55
File Organisation....Pages 56-56
Storing Information on Disk using a Sequential File....Pages 57-58
Storing Information on Disk (continued)....Pages 59-60
Reading Information from a Sequential File....Pages 61-61
Reading Information from a Sequential File (continued)....Pages 62-63
Program Design for File Handling Programs — Storing Data on Disk....Pages 64-64
Program Design for File Handling Programs — Reading Data from Disk....Pages 65-66
Revision Test....Pages 67-68
Review....Pages 69-69
Worked Project 1 — Stock Report....Pages 70-70
Suggested Programming Projects....Pages 71-82
Using FILLER and VALUE....Pages 83-83
Using a Printer....Pages 84-84
Using Edited Fields....Pages 85-85
Using READ INTO and WRITE FROM....Pages 86-86
Multiple Record Types....Pages 87-87
Tests — Alphabetic/Alphabetic-upper/Alphabetic-lower....Pages 88-88
Tests — Numeric/Positive/Negative/Zero....Pages 89-89
Using AND/OR/NOT....Pages 90-90
Expressing Conditions using Level 88....Pages 91-91
Revision Test....Pages 92-92
Worked Project 2 — Student Reports....Pages 93-93
Worked Project 3 — Employee File Validation....Pages 94-106
Worked Project 4 — Control Break....Pages 107-118
Suggested Programming Project....Pages 119-129
Sorting....Pages 130-130
Using PERFORM .. VARYING....Pages 131-131
Using Tables (Arrays) — Single Dimensional....Pages 132-132
Using Tables — Single Dimensional (continued)....Pages 133-133
Using Tables — Two Dimensional....Pages 134-134
Using Tables — Two Dimensional (continued)....Pages 135-135
Using REDEFINES....Pages 136-136
Revision Test....Pages 137-137
Indexed Sequential Files — Introduction....Pages 138-138
Writing to an Indexed Sequential File....Pages 139-139
Reading from an Indexed Sequential File....Pages 140-140
Indexed Sequential Files — Reading and Writing....Pages 141-141
Indexed Sequential Files — Dynamic Access....Pages 142-142
Worked Project 5 — Using an Indexed Sequential File....Pages 143-144
Sequential File Update....Pages 145-154
Worked Project 6 — Sequential File Update....Pages 155-155
Using INSPECT....Pages 156-163
Reference Modification....Pages 164-164
Calling Sub-programs....Pages 165-165
Calling Sub-programs (2) — Passing Parameters BY CONTENT....Pages 166-166
Calling Sub-programs (3) — Passing Parameters BY REFERENCE....Pages 167-167
Suggested Programming Projects....Pages 168-168
....Pages 169-169