两个指针变量可以指向相同的内存地址吗? [英] Can two pointer variables point to the same memory Address?

问题描述

如果 p 和 temp 是两个指针变量，其中 p 包含 NULL 和 temp 指向某个内存地址.

If p and temp are two pointer variables where p contains NULL and temp points to some memory address.

现在假设 p = temp;

这意味着现在 p 指向与 temp 指向的地址相同的地址.

That means now p points to same address as where temp is pointing.

这是否意味着两个指针变量 p 和 temp 现在指向相同的内存地址?

Does that mean two pointer variables p and temp are now pointing to the same memory address?

推荐答案

是的，两个指针变量可以指向同一对象:

Yes, two pointer variables can point to the same object:

指针是变量，其值是C对象的地址或空指针.

Pointers are variables whose value is the address of a C object, or the null pointer.

• 多个指针可以指向同一对象:

• multiple pointers can point to the same object:

char *p, *q;
p = q = "a";

一个指针甚至可以指向自身:

a pointer can even point to itself:

void *p;
p = &p;

这是另一个包含单个元素的双向链接循环列表的示例: next 和 prev 链接都指向同一位置，即结构本身:

here is another example with a doubly linked circular list with a single element: the next and prev links both point to the same location, the structure itself:

struct dlist {
    struct dlist *prev, *next;
    int value;
} list = { &list, &list, 0 };

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