c - feof(in) != EOF doesn't make while loop stop when at the end of file?

itemprop="text">

int main ()
{
 FILE
            *in;
 in = fopen("input.txt","r");
 char c =
            fgetc(in);

 while(feof(in) != EOF)
 {

            printf("%c",c);
 c = fgetc(in); 

            }
}

feof(in)
!= EOF doesn't stop the while loop from stopping but something like
!feof(in) seems to work. Any ideas?

Answer

feof
doesn't return EOF on end of file; it returns
true, which is not equal to EOF.

fgetc
will return EOF when it hits end-of-file.
Your code should be written as

int
            main ()
{
 FILE *in;
 in =
            fopen("input.txt","r");
 int c = fgetc(in); // note int not char

            while(c != EOF) // compare c to EOF

 {

            printf("%c",c);
 c = fgetc(in); 

            }
}

You
should not use feof as a loop condition, as it won't return
true until after you attempt to read past
the end of the file, meaning your loop will execute once too often.