C语言编程(结构体)

Question

这个问题已经有答案了:

In C, does a pointer to a structure always point to its first member? (3 个回答)

已关闭 7 年前。

我有一个问题。假设我们有一个定义如下的结构:

 typedef struct test { 
   int x;
   int y;
 };

现在，如果我按如下方式创建此结构的实例；

  test object;

“&object == &object.x”也会这样吗？？

Answer 1

是的，结构体的第一个数据成员的地址将等于结构体本身的对象的地址。

来自 C 标准(6.7.2.1 结构和 union 说明符)

15 Within a structure object, the non-bit-field members and the units in which bit-fields reside have addresses that increase in the order in which they are declared. A pointer to a structure object, suitably converted, points to its initial member (or if that member is a bit-field, then to the unit in which it resides), and vice versa. There may be unnamed padding within a structure object, but not at its beginning.