Thread: bitwise operations

Gday, I was wondering whether someone can help.

I need to perform shifts and bitwise operations on 64bits. I am trying to shift bits on a double type - 8 bytes. I think the problem lies in the fact that a machine word is 4 bytes. The following code seems to compile ok

double mask = 1 << 31;

but when i try something like this

double a, temp;

temp = mask & a;

i get an error something like: illegal operation on binary &.

Can anyone suggest a fix, perhaps some pointers on shifting bits between machine worsds.

cheers, Andrew.

Thanks, i hadn't considered that.