为什么在 C++ 中指向引用的指针是非法的?
正如标题本身提到的 - 为什么指向引用的指针是非法的，而在 C++ 中相反是合法的?
As the title itself mentions - why are pointer to a reference illegal, while the reverse is legal in C++?
推荐答案
一个指针需要指向一个对象.引用不是对象.
A pointer needs to point to an object. A reference is not an object.
如果你有一个引用 r，一旦它被初始化，任何时候你使用 r 你实际上是在使用引用所引用的对象.
If you have a reference r, once it is initialized, any time you use r you are actually using the object to which the reference refers.
因此，您无法首先获取引用的地址以获取指向它的指针.考虑以下代码:
Because of this, you can't take the address of a reference to be able to get a pointer to it in the first place. Consider the following code:
int x;
int& rx = x;
int* px = ℞
在最后一行，&rx 取的是rx 引用的对象的地址，所以和你说的& 完全一样;x.
In the last line, &rx takes the address of the object referred to by rx, so it's exactly the same as if you had said &x.
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