Thread: Using bitshifting to convert to binary.

Originally Posted by +Azazel+

With >>= it doesnt work at all.

Wait, no.. you're shifting the mask, not the variable. My mistake.
It's wrong because you're starting from the wrong side of the number. Start from the high order:

Code:

int main()
{
	unsigned int  Mask = 0x80;
	int           count;
	int           x;

	x = 0;
	count = 'a';
	for (x = 0; x < 8; x++)
	{
		if (count & Mask)
			printf("1");
		else
			printf("0");
		Mask >>= 1;
	}
}

Main can just be main(void) since you aren't using any of the command lines. You must include stdio.h and for the sake of gods, use a for loop instead - it looks better.

Originally Posted by +Azazel+

That works, Thank you!

What if I also want to assign values to the bits, not just extract them. What would be the method to do that?

What do you mean by "assign values to the bits"? You mean print 0, 64, 32, 0, 0, 0, 0, 1 or some such?

--
Mats

I believe it means that the OP wants to assign bits to a binary number, such as 0000 0000 becomes 0001 0000.
In that case, you simply binary OR the appropriate mask. Like 0x80 sets the highest bit (eg 1000 0000).