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file operations
summary
This subchapter looks at file operations.
free computer programming text book projecttable of contents
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This subchapter looks at file operations.
free computer programming text book projecttable of contents
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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.
This subchapter looks at file operations.
Pascal eof(x) — Pascal standard function that returns true if the end of file or end of data has been reached; otherwise returns false.
Pascal eoln(x) — Pascal standard function that returns true if the end of line has been reached; otherwise returns false.
The APPEND command is used in many forms of BASIC to combine a program or program parts from external storage (such as floppy disk or cassette tapes) to a program already in main memory. This can be used to bring in utility subroutines, to a large data set, or to bring in a large program in steps. The form is APPEND ProgramName. This command is sometimes called TAPPEND, MERGE, or WEAVE.
Use the Dir class to change the directory:
Dir.chdir( "/Usr/Users/James" )
Use the Dir class to obtain the present working directory (PWD):
saved = Dir.pwd
Use the Dir class to create a new directory:
Dir.mkdir( "/Usr/Users/James" )
Use the Dir class to delete an existing directory:
Dir.rmdir( "/Usr/Users/James" )
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).
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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 projectBuilding 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, 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) free downloadable college text book on computer programming. |
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Copyright © 2010, 2011 Milo
Created: November 1, 2010
Last Updated: March 30, 2011
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