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....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....Pages 39-39
Using IF .. ELSE (2)....Pages 40-40
Program Design using Structure Diagrams (Selection)....Pages 41-42
Program Design — Coding from a Structure Diagram (Selection)....Pages 43-44
Program Design — using Structure Diagrams (Problems involving Sequences and Selection)....Pages 45-45
Program Design — Coding from Structure Diagrams (Problems involving Sequences and Selection)....Pages 46-47
Program Design — using Structure Diagrams (Problems involving Sequences, Iteration and Selection)....Pages 48-49
Program Design — Coding from Structure Diagrams (Problems involving Sequences, Iteration and Selection)....Pages 50-50
Using GO TO....Pages 51-51
Revision Test....Pages 52-52
Using Files....Pages 53-53
File Organisation....Pages 54-55
Storing Information on Disk using a Sequential File....Pages 56-57
Storing Information on Disk (continued)....Pages 58-58
Reading Information from a Sequential File....Pages 59-60
Reading Information from a Sequential File (continued)....Pages 61-61
Program Design for File Handling Programs — Storing Data on Disk....Pages 62-63
Program Design for File Handling Programs — Reading data from Disk....Pages 64-65
Revision Test....Pages 66-66
Review....Pages 67-67
Worked Project 1 — Stock Report....Pages 68-79
Suggested Programming Projects....Pages 80-80
Using FILLER and VALUE....Pages 81-81
Using a Printer....Pages 82-82
Using Edited Fields....Pages 83-83
Using READ FROM and WRITE INTO....Pages 84-84
Multiple Record Types....Pages 85-85
Tests — Alphabetic/Numeric/Positive/Negative/Zero....Pages 86-86
Using AND/OR/NOT....Pages 87-87
Expressing Conditions using Level 88....Pages 88-88
Revision Test....Pages 89-89
Worked Project 2 — Student Reports....Pages 90-102
Worked Project 3 — Employee File Validation....Pages 103-113
Worked Project 4 — Control Break....Pages 114-124
Suggested Programming Project....Pages 125-125
Sorting....Pages 126-126
Using PERFORM.. VARYING....Pages 127-127
Using Tables (Arrays) — Single Dimensional....Pages 128-128
Using Tables — Single Dimensional (continued)....Pages 129-129
Using Tables — Two Dimensional....Pages 130-130
Using Tables — Two Dimensional (continued)....Pages 131-131
Using REDEFINES....Pages 132-132
Revision Test....Pages 133-133
Indexed Sequential Files — Introduction....Pages 134-134
Writing to an Indexed Sequential File....Pages 135-135
Reading from an Indexed Sequential File....Pages 136-136
Indexed Sequential Files — Reading and Writing....Pages 137-137
Indexed Sequential Files — Dynamic Access....Pages 138-139
Worked Project 5 — Using an Indexed Sequential File....Pages 140-149
Sequential File Update....Pages 150-150
Worked Project 6 — Sequential File Update....Pages 151-158
Calling Sub-programs....Pages 159-159
Calling Sub-programs (Continued)....Pages 160-160
Suggested Programming Projects....Pages 161-161