Re: C standard question?

On May 7, 8:20=A0pm, Eric Sosman <Eric.Sos...@[EMAIL PROTECTED]
> wrote:

> =A0 =A0 =A0 =A0 unsigned int ui =3D (unsigned int)uc << 24;


You wouldn't believe how many people do the likes of the following:

    char unsigned uc1, uc2;

    uc1 =3D 72;

    uc2 =3D ~uc1;

1) uc1 gets promoted to a signed int
2) The complement is gotten of this signed int
3) When the signed int is converted back to unsigned char, the
behaviour is implementation defined.

There's no problem on a two's complement system, and of course most
systems are two's complement, but still I'd definitely go with:

    uc2 =3D ~(unsigned)uc1;