A reference to a secondary pointer to a pointer

These two things in the past programming used a lot of times, but have been not very understanding of the principle, today I think for a long time, found a lot of niu Jiao Jian, the more I think the more do not understand the principle, so look up some information, is how many have some results, their own summary of it.

The secondary pointer, which is the pointer, is mainly to change the pointer itself data, where the pointer itself can be regarded as a variable, since it is a variable, it is certainly possible to modify its contents, so you can use a two-level pointer to change the pointer itself data.

A pointer to a reference, that is, a definition variable like *&, is beginning to understand this operator, because in my opinion, the pointer operator and the address operator should be reciprocal operators, put them together, can be offset, but the drill down, found that this is not the case, the operator is left-associative, That is, if you define a variable in this way: int *&i, then the combination should be: (int*) (&i), that is, this is a pointer-type reference, using this variable, you can manipulate the value of the pointer itself.

Then there is no pointer to the reference. The answer is no. Because the reference is not a variable, there is no pointer.