Sorry, but I get lot of errors on your macro on Borland C++ and also on Keil C51.

I use this macro and it works:
<pre>
#define B(x) ( x % 2
| x / 10 % 2 * 2
| x / 100 % 2 * 4
| x / 1000 % 2 * 8
| x / 10000 % 2 * 16
| x / 100000 % 2 * 32
| x / 1000000 % 2 * 64
| x / 10000000 % 2 * 128 )

Peter