divide big numbers

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divide big numbers

 
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  #1
Aug 5th, 2008
hello,

I have get through this problem, I want to divide these numbers but the result calculated by c++ is not right. I am quite sure it is due to the type of the variables but I don't know how to solve it.

C++ Syntax (Toggle Plain Text) 
  1.         unsigned long long u40=16825420246;
  2. 	unsigned long long u20=3171426;
  3. 	unsigned long long prod=u20*u20;
  4. 	double kx; //I have also proved with float but the problem still remains
  5.  
  6. 	kx=u40/prod;

Could anyone of you help me?
Thanks in advanced!
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Re: divide big numbers

 
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  #2
Aug 5th, 2008
Perhaps this:

cpp Syntax (Toggle Plain Text) 
  1. #include<iostream>
  2.  
  3. int main ()
  4. {
  5.     unsigned long long u40=16825420246llu;
  6.     unsigned long long u20=3171426llu;
  7.     unsigned long long prod=u20*u20;
  8.     double kx;
  9.  
  10.     kx=double(u40)/prod; 
  11.     std::cout<< "u40: "<<u40<<" u20: "<< u20
  12.         <<" Prod: "<<prod<<" kx: "<<kx;
  13.     std::cin.get() ;
  14.     return 0 ;
  15.  
  16. }
Last edited by Prabakar; Aug 5th, 2008 at 11:37 am.
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Re: divide big numbers

 
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  #3
Aug 5th, 2008
Thank you so much!It works!
I mark it as solved
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