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.
enumerated ordinal types
This subchapter looks at enumerated ordinal types (called user-defined ordinal types in Pascal).
The enumerated types are used for countable items, such as the cards in a deck of ordinary playing cards.
Many modern programming languages have an enumerated value data type. If not, a sequence of integers can be used instead. The enumerated data type simply makes it easier to keep track of the meaning of the integer values.
The following material is from the unclassified Computer Programming Manual for the JOVIAL (J73) Language, RADC-TR-81-143, Final Technical Report of June 1981.
The kinds of values provided by JOVIAL reflect the applications of the language; they are oriented toward engineering and contrl programming rather than, for example, commercial and business programming. The JOVIAL values are: 6. Status values, which are special words. They are used to describe the status of the system, or a particular part of the system, at any given time. For example, status values of "V(OK)", "V(WEAK)", or "V(BAD)" can be used to indicate the condition of a power cell.
Coding example: I am making heavily documented and explained open source code for a method to play music for free almost any song, no subscription fees, no download costs, no advertisements, all completely legal. This is done by building a front-end to YouTube (which checks the copyright permissions for you).
UNIX used as a generic term unless specifically used as a trademark (such as in the phrase UNIX certified). UNIX is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company Ltd.
Names and logos of various OSs are trademarks of their respective owners.