ctrl-d appends characters to output

[Matthias Apitz]

El día Saturday, January 17, 2015 a las 12:59:05PM -0500, less xss escribió:

> I've searched around quite a bit with no luck on this matter. I currently
> have an issue where I send EOF (ctrl-d) to some simple K&R2 exercises and
> the terminal returns the D character appended to my data when EOF is sent.
> I wish to prevent any and all extra characters from being appended and I
> would also like to understand why it's happening. The following code
> is an example exercise from K&R2 that yield said problem.
> 
> #include <stdio.h>
> 
> int main() {
>     double nc;
> 
>     for (nc = 0; getchar() != EOF; ++nc) {
>         ; /* syntactic null statement */
>     }
> 
>     printf("%.0f\n", nc);
> }
> 
> $ ./a.out
> 0D
> $

This is just a display issue of your typed Ctrl-d; the '0D' is the '^D'
where the '^' is overwritten by your output of the value of 'nc';
run your a.out as:

$ ./a.out < /dev/null

or change the printf(3) line to:

     printf("\n%.0f\n", nc);

HIH

	matthias

-- 
Matthias Apitz, guru at unixarea.de, http://www.unixarea.de/ +49-170-4527211
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