On 2018-10-11 09:01:55 -0400, Dennis Lee Bieber wrote: > On Thu, 11 Oct 2018 15:14:49 +0530, Iranna Mathapati > <iranna.gan...@gmail.com> declaimed the following: > >How to replace particular line text with new text on a file > >i have below code but its writing whole code. > > > For C-style streams (which seem to have taken over every operating > system) in which "lines" are determined by specific characters in the > stream, you can only "replace" a line IF THE REPLACEMENT IS THE EXACT SAME > SIZE! If there is any difference in length of the input and output lines, > you have to read/write everything from the line to the end of the file. > > I emphasize "C-style streams" as there were operating systems that did > support other file organizations natively.
And therefore you should call them "Unix-style streams".
> Xerox CP-V offered "consecutive", "keyed", and "random" file
> organizations.
I don't know if there was a C implementation for CP-V, but there is
certainly nothing in the C standard which would prevent a standard
conforming implementation of those file organizations.
hp
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