I have variable
int v1, v2;
I have two pointers:
int *ptr1, *ptr2;
and an array of pointers
int *array[2] = {ptr1, ptr2};
It is possible to change the ptr1 using pointer array to do operation like ptr1 = &v2
array[0] = &v1; (I know this record is wrong, but I mean the idea of writing new value into the ptr1 pointer)
You can't do it with a int* [] (array of pointer), because the element of array is just a copy, then any modification on the element has nothing to do with the original pointer. So array[0] = &v1; won't change ptr1.
You can use a int** [] (array of pointer to pointer) instead, e.g.
int **array[2] = {&ptr1, &ptr2};
then
*array[0] = &v1; // this will make ptr1 point to v1
int * ptr1 = &v1; int **arr[] = {&ptr1}; *arr[0] = &v2;