指针练习------详细的图文并茂法来解析

int main()
{
    //一维数组
    int a[] = { 1,2,3,4 };
    printf("%d\n", sizeof(a));

    printf("%d\n", sizeof(a + 0));

    printf("%d\n", sizeof(*a));

    printf("%d\n", sizeof(a + 1));

    printf("%d\n", sizeof(a[1]));

    printf("%d\n", sizeof(&a));

    printf("%d\n", sizeof(*&a));

    printf("%d\n", sizeof(&a + 1));

    printf("%d\n", sizeof(&a[0]));

    printf("%d\n", sizeof(&a[0] + 1));

    

---

    //字符数组

    char arr[] = { 'a','b','c','d','e','f' };
    printf("%d\n", sizeof(arr));
    printf("%d\n", sizeof(arr + 0));
    printf("%d\n", sizeof(*arr));
    printf("%d\n", sizeof(arr[1]));
    printf("%d\n", sizeof(&arr));
    printf("%d\n", sizeof(&arr + 1));
    printf("%d\n", sizeof(&arr[0] + 1));

    printf("%d\n", strlen(arr));
    printf("%d\n", strlen(arr + 0));
    printf("%d\n", strlen(*arr));
    printf("%d\n", strlen(arr[1]));
    printf("%d\n", strlen(&arr));
    printf("%d\n", strlen(&arr + 1));
    printf("%d\n", strlen(&arr[0] + 1));

​​​​​​​​​​​​​​  

---

    char arr[] = "abcdef";

    printf("%d\n", sizeof(arr));
    printf("%d\n", sizeof(arr + 0));
    printf("%d\n", sizeof(*arr));
    printf("%d\n", sizeof(arr[1]));
    printf("%d\n", sizeof(&arr));
    printf("%d\n", sizeof(&arr + 1));
    printf("%d\n", sizeof(&arr[0] + 1));

    printf("%d\n", strlen(arr));
    printf("%d\n", strlen(arr + 0));
    printf("%d\n", strlen(*arr));//error
    printf("%d\n", strlen(arr[1]));//error
    printf("%d\n", strlen(&arr));
    printf("%d\n", strlen(&arr + 1));
    printf("%d\n", strlen(&arr[0] + 1));

      

  

---

//指针存常量字符串

    char* p = "abcdef";

    printf("%d\n", sizeof(p));
    printf("%d\n", sizeof(p + 1));
    printf("%d\n", sizeof(*p));
    printf("%d\n", sizeof(p[0]));
    printf("%d\n", sizeof(&p));
    printf("%d\n", sizeof(&p + 1));
    printf("%d\n", sizeof(&p[0] + 1));

    printf("%d\n", strlen(p));
    printf("%d\n", strlen(p + 1));
    printf("%d\n", strlen(*p));
    printf("%d\n", strlen(p[0]));
    printf("%d\n", strlen(&p));
    printf("%d\n", strlen(&p + 1));
    printf("%d\n", strlen(&p[0] + 1));

    //二维数组
    int a[3][4] = { 0 };

    printf("%d\n", sizeof(a));
    printf("%d\n", sizeof(a[0][0]));
    printf("%d\n", sizeof(a[0]));
    printf("%d\n", sizeof(a[0] + 1));
    printf("%d\n", sizeof(*(a[0] + 1)));
    printf("%d\n", sizeof(a + 1));
    printf("%d\n", sizeof(*(a + 1)));
    printf("%d\n", sizeof(&a[0] + 1));
    printf("%d\n", sizeof(*(&a[0] + 1)));
    printf("%d\n", sizeof(*a));
    printf("%d\n", sizeof(a[3]));
    

    return 0;
}