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Internet Message Format | 1996-08-05 | 1.4 KB

Path: pegasus.montclair.edu!harmon
From: [e-mail] (Derek Harmon)
Newsgroups: comp.lang.c
Subject: Re: fwrite help?
Date: 12 Feb 1996 17:52:03 -0500
Organization: Montclair State University
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[e-mail] writes:
>What would the syntax for fwrite be to output 8 characters of
>char line[10] to a file?  K&R doesn't write much about it. Thanks
>for the help.

size_t fwrite(const void *ptr, size_t size, size_t n, FILE *stream); is the
prototype I have.  You can use line to devolve into a pointer towards the
first element in line, sizeof(char) for size insures compatibility on machines
where a character is more than one byte, and since you want 8 characters, set
n to 8.

: fwrite( line, sizeof(char), 8, fp);

   Of course, when they are contiguous in an array, and you know the sizeof a
char is 1 byte, it's much more efficient to say you want to write an 8-byte
block of memory once, instead of a 1-byte block of memory eight times.

                                                    -- Stone
--
# Derek Harmon (aka Stonelight)    [e-mail]
# - Computer Science Undergrad, Montclair State University, NJ
# - My views are my own, nobody else is this creative.  3;)>
... On a clear disk, you can seek forever.