c - Assigning a pointer to an integer

Question

Can I assign a pointer to an integer variable? Like the following.

int *pointer;
int array1[25];
int addressOfArray;

pointer = &array1[0];

addressOfArray = pointer;

Is it possible to do like this?

Answer 1

No, it is no valid to assign a pointer to an integer. It's a constraint violation of the assignment operator (C99, 6.5.16.1p1). A compiler has the right to refuse to translate a program with a pointer to integer assignment.