Composite Structure Design
A Simplified Guide to Structured COBOL Programming
A Simplified Guide to Structured COBOL Programming
Global variable considered harmful
ACM SIGPLAN Notices
Characteristics of a structured program
ACM SIGPLAN Notices
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Business data processing, for many reasons and in spite of the technique's being weak, has not used for data control the call capability available in many programming languages. COBOL has a CALL verb with a USING option, for example, yet it enjoys little use. People not working in business data processing sometimes use the call capability for data control and find it adds clarity, discipline and understandability to their work. Most of the advantage comes from the reduction or elimination of global data (global data is something business data processing people seem to be partial to). Yet the reliance on global data--the common COBOL practice--has been roundly criticized and even denounced [9, 10].