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

Answer 1

Try this:

#include 
int main () {
    char *str1 = "Hello ";
    char *str2 = "World!";
    char *ptr = str1;
    char *&rptr = str1;
    rptr = str2;
    std::cout << ptr << str1 << std::endl;
}

It prints "Hello world!" because ptr is a char pointer pointing to the string literal "Hello ". rptr is a reference to a char pointer, so when you change it (the pointer, not the thing it points at.) you change str1. And thus ptr points to "Hello ". str1 points to "World!".