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mcprabhakaran
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Multiply x with y without using +,*  
« on: May 16th, 2007, 4:09am »		 Quote Quote Modify Modify
Hi Friends,
 
  Tell me some ideas about multiplying a number x with y without using +,*;
 
 For example n*7 can be done by  
 
(n<<3)- n
 
 
Whether there is a common algorithm for this? If it is suggest me.
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Grimbal
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Re: Multiply x with y without using +,*  
« Reply #1 on: May 16th, 2007, 4:50am »		 Quote Quote Modify Modify
Since it is not forbidden: x/(1.0/y).
 
or exp(ln(x)-(-ln(y)))
 
Assuming we are dealing with floats or doubles.
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mcprabhakaran
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Re: Multiply x with y without using +,*  
« Reply #2 on: May 16th, 2007, 4:58am »		 Quote Quote Modify Modify
Thank U very Much... Smiley Smiley Smiley
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