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Article #45282ThinkC *scanf() problems...
From: Andrew Diseker
Date: Fri, 12 Jan 1990 03:27
Date: Fri, 12 Jan 1990 03:27
46 lines
1932 bytes
1932 bytes
Some time back, someone mentioned they were having problems with
scanf() in the ThinkC 4.0 ANSI library. I copied someone (else's?)
response which contained a 2-line patch to scanf.c. I made that fix, but
I'm still having a devil of a time trying to use the scanf family. I
have a text file which contains floating point numbers, which I am trying to
read in to separate floats. The following is the code I'm using to test.
#include <stdio.h>
main() {
float a = 1.2, b = 2.1, c, d;
FILE *fptr;
char *fileName = "sam";
char buffer[100];
fptr = fopen(fileName, "w+" );
fprintf(fptr, "%f %f", a, b, c, d );
fclose(fptr);
fptr = NULL;
fptr = fopen(fileName, "r+" );
/* this was the first way I tried
fscanf( fptr, "%f %f", &c, &d ); */
/* this was the second way I tried */
fgets( buffer, 100, fptr );
printf("%s from file\n", buffer );
sscanf( buffer, "%f %f", &c, &d );
printf( "a = %f, b = %f, c = %f, d = %f\n", a, b, c, d );
fclose( fptr );
}
Both the commented-out fscanf and the sscanf had the same effect:
a remained unchanged, b got trashed, c and d were set to garbage. Has
anyone fixed this, and are source code patches available? This is holding
up some critical work that I'd just as soon be done with, so I can go on
to even more critical work %*( E-mail replies requested, but I do try to
keep up on this group.
Ocheyn Spaceeba!
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<10387@deimos.ADS.COM>Path:
arc1-ca.pugleaf.net!utzoo!attcan!uunet!ns-mx!ceres!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!ames!deimos!deimos.ads.com!adisekerShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!ns-mx!ceres!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!ames!deimos!deimos.ads.com!adiseker From: adiseker@deimos.ads.com (Andrew Diseker) Newsgroups: comp.sys.mac,comp.sys.mac.programmer Subject: ThinkC *scanf() problems... Keywords: scanf sscanf fscanf bugs? Message-ID: <10387@deimos.ADS.COM> Date: 12 Jan 90 03:27:53 GMT Sender: adiseker@deimos.ADS.COM Distribution: na Organization: Advanced Decision Systems, Mt. View, CA (415) 960-7300 Lines: 46