Hi Roger.

06-Jun-04 17:18:58, Roger Scudder wrote to All


 RS> From: "Roger Scudder" 

 RS> On Saturday, June 05, 2004 2:11 PM, Darin McBride wrote:

 >> > > > 4. Multiply x by 7 without using multiplication
(*) operator.
 >> > > > > x = (x  > I like that
Roger.  I had done this
 >> less clever solution: > > x = (x << 2) +( x << 1) +  x;

 >> Less clever, but more correct.  Less likely to overflow the
 >> variable

AFAICT x<<3-x will give the same result as x*7 even when x<<3 does
overflow, because the -x will overflow in the opposite direction :)

 -=> Bye <=-

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