Question

I am currently trying to learn C by using the K&R, but I am completely stumped by example 1.5.2. For some reason, after I press Ctrl-Z, instead of printing nc, it prints nc multiplied by 2. I don’t know what could be causing this problem (I copied the code exactly how it is in the book). The compiler I am using is Visual Studio 2010. Here is the code:

#include <stdio.h>

main()
{

long nc;

nc = 0;
while (getchar() != EOF)
    ++nc;
printf("%1d\n", nc);


}

Answer 1

Because enter is a keystroke.

If your input is:

1<enter>
1<enter>
1<enter>
^z

it would output:

6