c++ - Reference to a pointer

Question

char *str = "Hello";

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

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?

Are references in C++ implemented using pointers?

Answer 1

What is the difference between ptr and rptr?

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".