music

# enumerated types

## summary

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

This is a brief introduction. This data type is explained in detail in the chapter on enumerated ordinal types.

## free computer programming text book project

If you like the idea of this project,

# enumerated values

This is a brief introduction. This data type is explained in detail in the chapter on enumerated ordinal types.

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

ITEM INDICATOR STAUS (V(RED),V(YELLOW),V(GREEN));
A status item, whose value can be
thought of as "V(RED)", "V(YELLOW)",
or "V(GREEN)" but which is, in fact,
compactly stored as an integer.  Thus
a programmer culd assign "V(RED)" to a
variable to indicate cooling system
failure instead of using a (presumably
non-mnemonic) integer.

Chapter 1 INTRODUCTION, page 5

1.1.5 Built-In Functions

The JOVIAL built-in functions provide advanced, specialized
operations that are not covered by the JOVIAL operators.

NEXT(s,i)      The i'th status value after status value s

FIRST(s)       First status value in status list for s
LAST(s)        Last status value in status list for s

Chapter 1 Introduction, page 9

This is a brief introduction. This data type is explained in detail in the chapter on enumerated ordinal types.

# 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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