EOF is defined to be -1.

getchar() returns int, but c is a unsigned char, the value of (c = getchar()) will be 255.    This will never compare equal to -1.

Ron, 

Hmmm... getchar/getc are defined as returning int in the man page and C is traditionally defined as an int in this code..

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’s of type unsigned char, the EOF will never be detected.

• while ((c = getchar()) != EOF) if (c == '\n') { /* entire record is now there */