Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

Then it would have been better, imo, to put 1 2 4 8 etc...
Event the great fysiks was confused :mrgreen:

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

Not necessarily confused exactly, just wondered how it worked. If you initialize with 3 then the next would be 6, 12, 24, 48, etc.

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

Yesn enum works like this, take last value and apply the supplied ( +1 if not specified) operation.
That's why in that specific case ( <<=1 ), if you don't initialiaze first value to 1, then it's 0 and you 0<<1 == 0 so it can't work.

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

Excuse my stupid question ...

I know that with the operator | can i increase bitsums values such as (1 <<1) | (1 <<2)
Exist another operator but to do the opposite of the operator |?, is say, to decreased bitsums?
Thanks all, and excuse my english.

PS: Thanks for the tut bugsy:)

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

&~

See the Common bit-field operations section. Both are right next to eachother.

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

Connor, IMO, it is better to show the enum values as the value of one with a respective left shift since thats how bit sums are referred to throughout the tut. I do understand where you are coming from though and will add the respective X << 1 shift as well as keep what I have now.

Zezima, that is explained above, you use var &= ~( 1 << 2 )

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

im very stupid for this u.u

if i wanna decreased 8 - 1 with bitsums, how can i make this ? :p

Result |= ( 1 << 3 ) & ~( 1 << 0 )

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

What are you asking?

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

8 = 1 << 3
1 = 1 << 0
8 = 1000
1 = 0001

7 = 1 << 0 | 1 << 1 | 1 << 2
7 = 0111

You could get 7 by doing ~8 but each situation will be different. You can't do addition or substation by 1 like that if thats what youre trying to do

Re: [TUT] Bits, Bit-fields, and Bit-wise Operators
 

8-1 :|