problem with feof() function in octave 1.1

[Vinayak Dutt]

hi:

i was trying to use feof() function to test end-of-file condition in the new 
octave 1.1
when i get error message:

octave:15> err = feof(f)
error: range error
error: invalid conversion from <unknown type> to real scalar
error: inapproriate file specifier
error: evaluating index expression near line 15, column 11
error: evaluating assignment expression near line 15, column 5

here f is the file opened with fopen().

--vinayak-
/*
 * vinayak dutt
 * graduate student, ultrasound research
 * mayo graduate school, rochester mn
 *
 * e-mail: address@hidden
 *         address@hidden
 *
 */
#include "disclaimer.h"