题解 | #筛选法求素数#

#include <stdio.h>
int main()
{
    int n = 0;
    while (scanf("%d", &n) != EOF)
    {
        int arr[100];
        int i, j, count = 0;
        int k = 2;
        for (i = 0; i < n - 1; i++)
        {
            arr[i] = k;
            k++;
        }
        for (i = 2; i <= n; i++)
        {
            for (j = 0; j < n - 1; j++)
            {

                if (arr[j] > i && arr[j] % i == 0)
                {
                    arr[j] = 0;
                    count++;
                }
            }
        }
        for (i = 0; i < n - 1; i++)
        {
            if (arr[i] != 0)
            {
                printf("%d ", arr[i]);
            }
        }
        printf("\n%d", count);
    }
    return 0;
}