#include <stdio.h>
void main()
{
    int a[10]={1,2,3,4,5,6,7,8,9,10};
    int i,j;
    int count;
    for (i=0;i<=9;i++)
    {
        count=0;
        for (j=1;j<=i;j++)
        {
            if (a[i]%a[j]==0)
                count++;
        }
        if (count==2)
                printf("%d ",a[i]);

    }
}                答案怎么是 4 ，9 ？求解啊 。，