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From: Paul Winalski <paul.winalski@gmail.com>
Date: Sat, 16 May 2020 12:28:01 -0400
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To: The Eunuchs Hysterical Society <tuhs@tuhs.org>
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Subject: Re: [TUHS] v7 K&R C
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> On Fri, May 15, 2020 at 4:02 PM <ron@ronnatalie.com> wrote:
>
>Unfortunately, if c is char on a machine with unsigned chars, or it=E2=80=
=99s of
>type unsigned char, the EOF will never be detected.
>
>    - while ((c =3D getchar()) !=3D EOF) if (c =3D=3D '\n') { /* entire re=
cord is now there */

The function prototype for getchar() is:    int getchar(void);

It returns an int, not a char.  In all likelihood this is specifically
*because* EOF is defined as -1.  The above code works fine if c is an
int.  One always has to be very careful when doing a typecast of a
function return value.

-Paul W.