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Control Break: Key Field, COBOL, Conditional (Programming)
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(Buch) |
Dieser Artikel gilt, aufgrund seiner Grösse, beim Versand als 2 Artikel!
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| Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. In a computer
program, a control break occurs when there is a change in the value of
one of the keys on which a file is sorted which requires some extra
processing. For example, with an input file sorted by post code, the
number of items found in each postal district might need to be printed
on a report, and a heading shown for the next district. Quite often
there is a hierarchy of nested control breaks in a program, e.g. streets
within districts within areas, with the need for a grand total at the
end. Structured programming techniques have been developed to ensure
correct processing of control breaks in languages such as COBOL and to
ensure that conditions such as empty input files and sequence errors are
handled properly. |
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i.d.R. innert 7-14 Tagen versandfertig
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