On Wed, Oct 28, 2020 at 11:44:35AM +0100, Adam Kandur wrote:
>
> hi everyone, i'm new in c programming. i tried to read sources but stuck with enum.
> as i know, enum is mainly used to assign names to integral constants. but i don't understand, for example, this code
> ----------------------------------------------
> enum term_mode {
> ��� MODE_WRAP������� = 1 << 0,
> ��� MODE_INSERT����� = 1 << 1,
> ��� MODE_ALTSCREEN�� = 1 << 2,
> ��� MODE_CRLF������� = 1 << 3,
> ��� MODE_ECHO������� = 1 << 4,
> ��� MODE_PRINT������ = 1 << 5,
> ��� MODE_UTF8������� = 1 << 6,
> };
> ----------------------------------------------why not simply write ?
> ----------------------------------------------
> enum term_mode {
> ��� MODE_WRAP������� = 1,
> ��� MODE_INSERT����� = 2,
> ��� MODE_ALTSCREEN�� = 4,
> ��� MODE_CRLF������� = 8,
> ��� MODE_ECHO������� = 16,
> ��� MODE_PRINT������ = 32,
> ��� MODE_UTF8������� = 64,
> };
> ----------------------------------------------
>
Hi,
They are the same and are coding-style.
The bitshift typically hints that the value is used as a bitmask somewhere.
--
Kind regards,
Hiltjo
Received on Wed Oct 28 2020 - 11:54:36 CET