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You're reading from  Learn C Programming. - Second Edition

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Published inAug 2022
PublisherPackt
ISBN-139781801078450
Edition2nd Edition
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Jeff Szuhay
Jeff Szuhay
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Jeff Szuhay

Jeff Szuhay is the principal developer at QuarterTil2 which specializes in graphics-rich software chronographs for desktop environments. In his software career of over 35 years, he has engaged in a full range of development activities from systems analysis and systems performance tuning to application design, from initial development through full testing and final delivery. Throughout that time, he has taught computer applications and programming languages at various educational levels from elementary school students to university students, as well as developed and presented professional, on-site training.
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Understanding basic file concepts

Up to this point, data inputs and outputs have moved into and out of our C programs via streams through scanf(), printf(), or other related I/O functions. However, most data exists on computers in files. Files represent persistent data storage in that they exist between invocations of any programs and exist even when a computer is turned off.

Any file will have been created because a program captured input from the user and saved it to a storage medium. The files could've been modified by another program and then saved, they could have been copied by any number of programs, or they could have been created from other files by yet another program. Ultimately, nothing happens to a file unless a program does something to it.

Revisiting file streams

A stream is the means of transferring data, specifically bytes, between any device and a program. Streams are device-oriented. Devices, as we have...

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Learn C Programming. - Second Edition
Published in: Aug 2022Publisher: PacktISBN-13: 9781801078450
© 2022 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Jeff Szuhay

Jeff Szuhay is the principal developer at QuarterTil2 which specializes in graphics-rich software chronographs for desktop environments. In his software career of over 35 years, he has engaged in a full range of development activities from systems analysis and systems performance tuning to application design, from initial development through full testing and final delivery. Throughout that time, he has taught computer applications and programming languages at various educational levels from elementary school students to university students, as well as developed and presented professional, on-site training.
Read more about Jeff Szuhay

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