C语言 自定义函数处理素数&

解题思路:

注意事项:

参考代码:

#include<stdio.h>

int main()

{

         void judge_prime(int num);

         int num;

         scanf_s("%d", &num);

         judge_prime(num);

}

void judge_prime(int num)

{

         int i;

         if (num > 1)

         {

                 for (i = 2; i < num; i++)

                 {

                         if (num % i == 0)

                         {

                         printf("not prime");

                         break;

                         }

                 }

                 if (i == num)printf("prime");

         }

         else printf("not prime");

}