What is the practical application of this expression? On Tue, Sep 6, 2011 at 5:38 PM, Dave <dave_and_da...@juno.com> wrote:
> @Mohit: If n is a power of 2, then the macro returns x if x is a > multiple of n or x rounded up to the next multiple of n if x is not a > multiple of n. E.g., ROUNDUP(16,4) = 16 and ROUNDUP(17,4) = 20. The > result doesn't appear useful if n is not a power of 2. > > Since ~(n-1) = -n, it could be written more compactly as > > #define ROUNDUP(x,n) ((x+n-1)&(-(n))) > > Dave > > On Sep 6, 5:06 am, Mohit Goel <mohitgoel291...@gmail.com> wrote: > > #define ROUNDUP(x,n) ((x+n-1)&(~(n-1))) > > > > what does the following macro do .... > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algogeeks@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > > -- *Sandeep Kumar,* ( Mobile +91-9866507368 *“I believe in smart work, Believe Me”* -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.