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 3204, 1/161 ȸ¿ø°¡ÀÔ  ·Î±×ÀΠ 
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   [C ¾ð¾î] ¼Ò¼ö ã±â

http://www.hackerschool.org/HS_Boards/zboard.php?id=QNA_programming&no=2812 [º¹»ç]


#include <stdio.h>
#include <math.h>
#include <stdbool.h>

void FindItOut(int number, int *candidate);
int main (int argc, const char * argv[])
{
    int *startNum;
        int ans;
        
        printf("Type in a number: \t");
        scanf("%d", startNum);
        
        FindItOut(startNum, &ans);
        printf("The next prime after %d is %d.\n", startNum, ans);
}

void FindItOut(int number, int *ans)
{
        int i, last;
        bool isPrime;
        
        if(number <2)
                *ans = 2;
        else if(number =2)
                *ans = 3;
        else
        {
                *ans = number;
                
                if (*ans % 2 == 0)
                        *ans--;
                do
                {
                        isPrime = true;
                        *ans += 2;
                        
                        last = sqrt(*ans);
                        
                        for (i =3; (i<=last) && isPrime; i+=2)
                        {
                                if ((*ans % i ) == 0)
                                        isPrime = false;
                                
                        }
                }
                while(!isPrime);
        }
}

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  Hit : 5775     Date : 2010/12/22 06:56



    
ruka270 else if(number =2)
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