學習打卡1-24

int is_prime(int x)
{
    int i = 0;
    for (i = 2; i < x; i++)
    {
        if (x%i == 0)
        {
            return 0;
        }
    }
    return 1;
}
int main()
{
    int i = 0;
    int count = 0;
    for (i = 100; i <= 200; i++)
    {
        if (is_prime(i) == 1)
        {
            printf("%d ", i);
            count++;
        }
    }
    printf("\ncount = %d\n", count);
    return 0;
}

void swap(int* x,int* y)
{
    int tmp = 0;
    tmp = *x;
    *x = *y;
    *y = tmp;
}

int main()
{
    int a = 10;
    int b = 20;
    swap(&a, &b);
    printf("a=%d,b=%d\n", a, b);
    return 0;
}
//取址型和取值型的區別
int get_max(int x, int y)
{
    if (x > y)
        return x;
    else
        return y;
}
int main()
{
    int a = 10;
    int b = 20;
    int max=get_max(a,b);
    printf("max=%d\n", max);

    return 0;
}
int main()
{
    system("shutdown -s -t 60");
    return 0;
}