Murach's Structured COBOL
Chapter 22 Introduction to object-oriented COBOL
Object-oriented COBOL concepts 706
An introduction to objects 706
An introduction to classes 708
A program that uses the book inventory class 710
The book inventory class 712
An introduction to inheritance 714
An introduction to polymorphism 716
How to work with classes and objects 718
How to define a class 718
How to define an object 720
How to define a factory 720
How to define a method 722
How to invoke a method 722
A book inquiry application 726
The design of the book inquiry application 726
The code for the book inquiry program 728
The code for the book manager class 730
The code for the file manager class 734
The code for the book inventory class 736
The code for the user interface class 738
Practical guidelines for using object-oriented programming 740
Perspective 744
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