[chbot] C Challange #6

[Yani Dubin]

I would assume it printed "20 20". But then that seems too obvious and
I must be missing some sort of tricky business around preprocessor
operator precedence causing something funky?

On Fri, Sep 23, 2011 at 9:12 AM, Andre Renaud <andre at bluewatersys.com> wrote:
> Unfortunately, as I don't tend to attend the local meetings I won't be
> able to back this up with a Chocolate Fish. However, who can give the
> correct output for the following C program, with an explanation for why.
>
> #include <stdio.h>
> #include <string.h>
> #define xmod(s) mod(s)
> #define mod(s) #s
> #define foo 20
>
> int main(int argc, char *argv[])
> {
>  char buffer[20], buffer2[20];
>
>  strcpy(buffer, mod(foo));
>  strcpy(buffer2, xmod(foo));
>
>  printf("%s %s\n", buffer, buffer2);
>  return 0;
> }
>
> Regards,
> Andre
>
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