About pointers and references

verance

Moreover, as I said in my first reply, the existence of null pointers will inevitably lead to the existence of "null references"

master20404

1.Passed a reference to int&a;
The first sentence in the function is int * p =&a;
After that, all operations are performed on p, so there is no difference from passing pointers.
2.Pass a pointer int * p;
The first sentence in the function is int&a = * p;
After that, all operations are performed on a, so there is no difference from passing by reference.
3.If you say
int * p = NULL;
int * p = (int *) 1;
Is dangerous
4, then
int&a = * ((int *) 0);
int&a = * ((int *) 1);
Also dangerous

In favor ofverance, I personally feel that pointers and references have no essential difference except for writing.

boxer2005

They are similar to each other. In fact, references are also implemented by pointer methods at the bottom.

112233qwe

Thank you