How do I cast a pointer to an int

Question

I\'m trying to store the value of an address in a non pointer int variable, when I try to convert it I get the compile error \"invalid conversion from \'int*\' to \'int\'\" this

Answer 1

int may not be large enough to store a pointer.

You should be using intptr_t. This is an integer type that is explicitly large enough to hold any pointer.

    intptr_t thatvalue = 1;

    // stuff

    thatvalue = reinterpret_cast(ip);
                // Convert it as a bit pattern.
                // It is valid and converting it back to a pointer is also OK
                // But if you modify it all bets are off (you need to be very careful).