对指针的引用 [英] Reference to a pointer

问题描述

char *str = "Hello";

char *ptr = str;
char *&rptr = str;

ptr 和 rptr 有什么区别?我知道 rptr 是对指针的引用(理论上)，但它在使用 ptr 的实现方面有何不同?

What is the difference between ptr and rptr? I understand rptr is a reference to a pointer(in theory) but how does it differ in terms of implementation with ptr?

C++ 中的引用是使用指针实现的吗?

Are references in C++ implemented using pointers?

推荐答案

ptr 和 rptr 有什么区别?

What is the difference between ptr and rptr?

如果你这样做 char *world = "World";rptr = world; 然后打印str，它会打印World".如果你做 ptr = world; 然后打印 str，它会打印Hello".

If you do char *world = "World"; rptr = world; and then print str, it will print "World". If you do ptr = world; and then print str, it will print "Hello".

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