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Full Discussion: erroneous output
Top Forums Programming erroneous output Post 302126322 by bishweshwar on Wednesday 11th of July 2007 06:37:35 AM
Old 07-11-2007
erroneous output

#include<stdio.h>
int main ()
{
FILE* f_read;
FILE* f_write;
char *string[80];
f_read=fopen("file1","r");

while(!feof(f_read));
{
fscanf(f_read,"%s",string);
fprintf(stdout,"%s\n",string);
}

return 0;
}


INPUT FILE
___________
manu
jilu
ruta

OUTPUT
-----------
manu
jilu
ruta
ruta

why the last line is being read two times
 

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feof(3) 						     Library Functions Manual							   feof(3)

NAME
feof - Tests EOF on a stream LIBRARY
Standard C Library (libc) SYNOPSIS
#include <stdio.h> int feof( FILE *stream); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: feof(): XSH5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
Specifies the input stream. DESCRIPTION
The feof() function tests the EOF (end-of-file) condition on the specified stream. NOTES
[Tru64 UNIX] The feof() function may be a macro (depending on the compile-time definitions used in the source). Consequently, you cannot use this interface where a function is necessary; for example, a subroutine pointer cannot point to it. RETURN VALUES
If EOF has previously been detected reading the input stream specified by the stream parameter, a nonzero value is returned. Otherwise, a value of 0 (zero) is returned. RELATED INFORMATION
Functions: ferror(3), fileno(3), clearerr(3), fopen(3) Standards: standards(5) delim off feof(3)
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