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Time, date, and duration
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Representing times, dates, and durations in a computer.
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Representing times, dates, and durations in a computer.
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This subchapter is a stub section. It will be filled in with instructional material later. For now it serves the purpose of a place holder for the order of instruction.
Professors are invited to give feedback on both the proposed contents and the propsed order of this text book. Send commentary to Milo, PO Box 1361, Tustin, California, 92781, USA.
Representing times, dates, and durations in a computer.
Very few languages have a built-in data type for handling time, date, and duration. Ada is a notable exception.
In general, some other data type is used (usually either some kind of integer or some kind of character string) and the time and date information is formatted in a language specific or machine specific manner.
“31 Every object in the language has a type, which characterizes a set of values and a set of applicable operations. The main classes of types are elementary types (comprising enumeration, numeric, and access types) and composite types (including array and record types).” —:Ada-Europe’s Ada Reference Manual: Introduction: Language Summary See legal information
“33 Numeric types provide a means of performing exact or approximate numerical computations. Exact computations use integer types, which denote sets of consecutive integers. Approximate computations use either fixed point types, with absolute bounds on the error, or floating point types, with relative bounds on the error. The numeric types Integer, Float, and Duration are predefined.” —:Ada-Europe’s Ada Reference Manual: Introduction: Language Summary See legal information
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Create your own copy from the original source code/ (presented for learning programming).
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Created: December 12, 2010
Last Updated: December 12, 2010
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