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c++ code need answer

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Join Date: Oct 2009

Posts: 2

Reputation: rechene has a little shameless behaviour in the past

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rechene

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Newbie Poster

c++ code need answer

-4

Oct 22nd, 2009

write a function that determine whether a number is prime.

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Join Date: Oct 2006

Posts: 2,978

Reputation: niek_e has a reputation beyond repute

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niek_e

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Cenosillicaphobiac

Oct 22nd, 2009

Do it yourself.

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Join Date: Nov 2008

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Reputation: Grn Xtrm will become famous soon enough

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Grn Xtrm

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Posting Pro in Training

Oct 22nd, 2009

Why don't you try searching the forums? The whole point of keeping the code in previous threads is so people will be able to learn from them in the future. I've seen this question asked many times in the past few weeks. Or you can actually try doing it yourself (that would be the prefered method)

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Join Date: Oct 2009

Posts: 14

Reputation: Unix* is an unknown quantity at this point

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Unix*

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-2

Oct 22nd, 2009

Hi,

simple solution would be this boolean method...

returns true if it is prime, false otherwise...

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <cmath>
 
bool IsPrime(int num)
{
      if(num == 0)
         return true;
 
     num = abs(num);
 
     for(int i = 2; i <= sqrt(num); i++)
     if(num % i == 0)
        return false;
 
     return true;   
}
#include <cmath>

bool IsPrime(int num)
{
      if(num == 0)
         return true;

     num = abs(num);

     for(int i = 2; i <= sqrt(num); i++)
     if(num % i == 0)
        return false;
  
     return true;   
}