Logo – A Language for Learning

LOGO A Language for Learning
	Sprache	englisch
	Autor(en)	Virginia Carter Grammer, E. Paul Goldenberg, Leigh Klotz, Jr., Marlene Kliman, Nola Sheffer, Patrick G. Sobalvarro, Deborah G. Tatar, J. Sheridan McClees, Peter von Mertens
	Verlag	Commodore Terrapin Inc.
	Jahr	1982
	ISBN	ISBN nicht vorhanden
	Neupreis	?
	Datenträger
	Seitenzahl	ca. 360
	letzte Auflage
	Genre	Programmieren / Logo
	Information	Herausgeber: Mark Eckenwiler

Beschreibung

Einschaltmeldung "Commodore Logo".

This tutorial will teach you how to use Logo. The Appendix has several sections. There are explanations of error messages; descriptions of the files on the Utilities disk; documentation on the edit mode of Logo; suggested answers to projects in the Tutorial; and information about the internal workings of Logo. The Glossary contains descriptions of Logo primitives with explanations of what they do. You need not read the Appendix and Glossary to start using Logo, but you will find it useful as a reference tool when you want to continue.

Inhaltsverzeichnis (stark gekürzt)

BEGINNING LOGO                         B-1 ... B-11

GRAPHICS                               G-1 ... G-64

COMPUTATION: HANDLING NUMBERS          C-1 ... C-15

WORDS AND LISTS                      W&L-1 ... W&L-86

SPRITES                                S-1 ... S-21

MUSIC                                  M-1 ... M-9

APPENDIX                               A-1 ... A-159

Leseprobe

Driving the Turtle: FORWARD (FD), BACK (BK), RIGHT (RT), LEFT (LT)

You move the turtle with turtle commands. The turtle can leave a trail (draw a line) as it moves, allowing you to produce a picture.

FORWARD always moves the turtle in the direction it is pointed. Type

FORWARD 100 RETURN 

or the short equivalent

FD 100 RETURN 

The turtle will move forward one hundred turtle steps. The space between the command and the number is necessary. If it is omitted, Logo will assume the whole thing to be a procedure name. (Try FD100 without the space.)

If you leave out the number that FORWARD is expecting, or the space, or do something else that Logo does not recognize, Logo will try to help you by printing an error message. These are usually self-explanatory, but if you can­not figure out what is wrong, turn to the Appendix where error messages are explained with examples.

To make the turtle turn, type the direction of the turn and the number of de­grees:

RIGHT 90 RETURN  or RT 90 RETURN 

Meinung

User: "Deine Meinung zu diesem Buch"

Weblinks

• D64-Images auf www.nostalgia8.nl