#include <stdio.h>int main (void){?? ?int val;?? ?int i;?? ?printf("請輸入數字 ");?? ?scanf("%d",& val);?? ?for (i=2;i<val;++i)?? ??? ?{?? ??? ??? ?if(val%i==0)?? ??? ??? ?break;?? ??? ?}?? ?if(i==val)?? ???? printf("yes\n");?? ?else?? ??? ?printf("no\n");??? system("pause");return 0;}