music

# enumerated ordinal types

## summary

This subchapter looks at enumerated ordinal types.

The enumerated types are used for countable items, such as the cards in a deck of ordinary playing cards.

## free computer programming text book project

If you like the idea of this project,

### stub section

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.

### enumerated type

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.

## JOVIAL

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.

Chapter 1 INTRODUCTION, page 3

“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

“32/2 An enumeration type defines an ordered set of distinct enumeration literals, for example a list of states or an alphabet of characters. The enumeration types Boolean, Character, Wide_Character, and Wide_Wide_Character are predefined.” —:Ada-Europe’s Ada Reference Manual: Introduction: Language Summary See legal information

# free music player coding example

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).

View music player in action: www.musicinpublic.com/.

Create your own copy from the original source code/ (presented for learning programming).

## view text bookHTML file

Because I no longer have the computer and software to make PDFs, the book is available as an HTML file, which you can convert into a PDF.

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## free computer programming text book project

Building a free downloadable text book on computer programming for university, college, community college, and high school classes in computer programming.

If you like the idea of this project,

send donations to:
Milo
PO Box 1361
Tustin, California 92781

Supporting the entire project:

If you have a business or organization that can support the entire cost of this project, please contact Pr Ntr Kmt (my church)

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