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Oct 22nd, 2009

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c++ code need answer

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write a function that determine whether a number is prime.

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rechene

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Oct 22nd, 2009

Re: c++ code need answer

Do it yourself.

Nick Evan

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Re: c++ code need answer

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)

Grn Xtrm

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Oct 22nd, 2009

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Re: c++ code need answer

Hi,

simple solution would be this boolean method...

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

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;   
}

ps...google

Unix*

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