Murach's Structured COBOL
Chapter 21 How to become an effective maintenance programmer
Statements and features you should be aware of 688
Perform Thru and Go To statements 688
Go To Depending statements 690
Section names in the Procedure Division 692
Qualification and the Move, Add, and Subtract Coreesonding statements 694
Declarative sections 696
The basic skills for maintaining programs 698
A structured procedure for maintaining a program 698
What to change and where to change it 700
How to document the changes in the source code 702
Perspective 704
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