Subj : Re: bit shifting
To   : comp.programming
From : Alex Fraser
Date : Sun Aug 14 2005 04:17 pm

"Rob Somers" <mr_semantics@hotmail.com> wrote in message
news:fJHLe.445$7R.20740@news20.bellglobal.com...
> #include <stdio.h>
>
> int main(void)
> {
>
>   unsigned short x = 128;
>   unsigned short y = 255;
>
>   printf("%u\n", (unsigned short)(~x & y));
>   printf("%u\n", (unsigned short) ~x);
>
>   return 0;
> }
>
> if 127 is 1111111 and 255 11111111, then &ing the two should give
> 01111111.

Yes, but the above apparently computes 0xff7f & 0xff.

> Why does the second printf() give 65407?

What did you expect it to give?

Alex

.