Bitwise shift help please?

[knservis]

Hi,

can somebody please explain to me what is the difference between right
(or left) shift >> and right shift assign >>= ? Is it only
precidence?

Kosta

 

[Barry Schwarz]

Hi,

can somebody please explain to me what is the difference between right
(or left) shift >> and right shift assign >>= ? Is it only
precidence?

Kosta

unsigned int x = 0x10;

x >> 1;

This statement computes the value of the expression (0x08) and then
discards it.

x >>= 1;

This statement computes the same value but assigns the result to x.


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[Farmer]

In other words x>>1; does not alter x?( Answering myself: Off course
it makes perfect sense) Thanks

 

[Rahul]

Hi,

can somebody please explain to me what is the difference between right
(or left) shift >> and right shift assign >>= ? Is it only
precidence?

Kosta

Hi Kosta,
What exactly you have in mind when you attribute the difference
between >> and >>= to precedence?
Can you please elaborate your querry, even though you have got the
answers from the above two responses?
Thanks,

 

[santosh]

Hi Kosta,
What exactly you have in mind when you attribute the difference
between >> and >>= to precedence?
Can you please elaborate your querry, even though you have got the
answers from the above two responses?
Thanks,

The two statements are not directly comparable, since they're not the
same.

 

[Eric Sosman]

Hi,

can somebody please explain to me what is the difference between right
(or left) shift >> and right shift assign >>= ?

The same as the difference between the addition operator +
and the add-and-assign operator +=.

> Is it only
> precidence?

No, it's more than just precEdence. Both operators perform
a shift (or an add, or whatever), but only the "-and-assign" forms
also do an assignment.