whats wrong with this code

Question

# include<iostream>
using namespace std;
int main (){
const int i = 29;
const int* const ptr = &i;
(*ptr)++;
int j = 11;
ptr = &j;
cout << i;
return 0;
}

Answer 1

const int* const ptr = &i
This is constant pointer to the constant object. When you will assign address then you can't change the value of assigned object and also you can't "move" this pointer . I mean you can't set this pointer again to another constant object. I think there is two wrong line:
(*ptr)++;
ptr = &j; /* we can't move this kind of pointer*/

Answer 2

Constant values are read-only, so you can neither overwrite nor modify them. Attempting to increment 'i' or to reassign 'ptr' both violate this.