COBOL program supports CICS. A developer’s question is why Working-storage and Linkage sections are needed. Below are my answers.
Why You Need Working Storage Definitions in CICS
You can define error-counts, File descriptions at 01 levels, Record key, Symbolic map, etc.
.
COPY Mapname
COPY DFHAID
COPY DFHBMSCA
You can also define, Transactions-ids, File-length, etc.
Why You Need Linkage Section in CICS
In the Linkage section, you can define DFHCOMMAREA, Pointers, Variables related to the ADDRESS.
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