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From: waldi@moacs.indiv.nl.net (Waldi Ravens)
Newsgroups: comp.unix.bsd.misc,alt.unix.wizards,comp.unix.misc
Subject: Re: How to write end of file character into file??!
Date: 26 Apr 1996 02:13:52 +0200
Organization: Private Site, Baarn
Lines: 47
Message-ID: <4lp4g0$dp0@moacs11.moacs.indiv.nl.net>
References: <xsvarshney-0604962038290001@newshub.csu.net> <4l5le1$amd@is05.micron.net> <4l85m7$fjs@sv024.SanDiegoCA.ATTGIS.COM> <4lg9i8$8if@is05.micron.net>
NNTP-Posting-Host: moacs11.moacs.indiv.nl.net
Xref: euryale.cc.adfa.oz.au comp.unix.bsd.misc:824 alt.unix.wizards:3709 comp.unix.misc:22185
Dwight Tovey <dwight@micron.net> wrote:
>
> However the following code will go to the "real" end of the file for both
> binary and text files:
>
> char ch;
> FILE *fp
>
> fp = fopen( "foo", "r" );
> while( !feof( fp )) {
> ch = fgetc(fp);
> putchar( ch );
> }
Sorry, it won't. Two mistakes (apart from the obvious syntax error):
1) assuming an ideal world without I/O errors.
2) confusing C with Ada (or Pascal).
Corrected version:
char *fn = "foo";
FILE *fp = fopen(fn, "r");
while (1) {
char ch = fgetc(fp);
if (ferror(fp))
err(EXIT_FAILURE, "%s", fn);
if (feof(fp))
break;
putchar(ch);
}
Of course, that looks rather complicated and inefficient compared to:
int ch;
while ((ch = fgetc(fp)) != EOF)
putchar(ch);
if (ferror(fp))
err(EXIT_FAILURE, "%s", fn);
Regards,
Waldi
--
Never let your schooling interfere with your education.