[NaS]

Quote:

Originally Posted by RakeDW Hi, I need help with bit operations.. Lets say I have all bits "turned on" Код: 11111111111111111111111111111111 Now I have variables ex. Код: new myVar = 8; And I must turn off 8th bit and get something like Код: 11111110111111111111111111111111 I tried Код: new data; // all bits off new myVar1 = 2, myVar2 = 8, myVar3 = 12; data |= myVar1; // turn on 2nd bit data |= myVar1; // turn on 12th bit print((data & myVar1) ? ("myVar1 passed") : ("myVar1 failed")); print((data & myVar2) ? ("myVar2 passed") : ("myVar2 failed")); print((data & myVar3) ? ("myVar3 passed") : ("myVar3 failed")); // Out: [20:49:25] myVar1 passed [20:49:25] myVar2 failed [20:49:25] myVar3 failed

First off, 8 fails because you didn't set it.
Furthermore you use myVar1 twice and expect it to do different things (but in fact you set the 2nd twice).

Your test should be:

Код:

data |= myVar1; // turn on 2nd bit
data |= myVar2; // turn on 8th bit
data |= myVar3; // turn on 12th bit

But even that isn't correct as Dayrion said. Your test was just wrong additionally to the operations.

Also 8 wouldn't set the 8th bit. 8 in binary is not equal to b10000000. 8 is b1000.
12 is also two bits that get set. It's b1100