C++學習筆記（5）

    int main()
    {
        int* p;
        *p = 555;//野指針
        printf("%d\n", *p);
    
        int* pp = NULL;//空指針
        *pp = 100;
        printf("%d\n", *pp);
        return 0;
    }

    int main()
    {
        int a = 66;
        int* p = &a;
        printf("%p\n", p);
        printf("%d\n", *p);
        return 0;
    }

    int main()
    {
        int arr[] = {1, 2, 3, 4, 5};
        int* p = arr;
        printf("%p,%p\n", arr, p);
        for (int i = 0; i < 5; ++i)
        {
            printf("%d,", *(p + i));
            printf("%p\n", p + i);
        }
        return 0;
    }
    ```