C++ memory

Question

Assume I know a hexadecimal memory location of an integer.
By knowing that address, how can I get to the number? (The hexadecimal memory location that I know is NOT stored in a variable etc.. I just want to type it in code and get the number).

Answer 1

After testing...
int value = 42;
long address = (long)&value;
int casted = *(int*)address;
By converting the address to the pointer of the type and dereference it, you can get the value back.
But honestly, I don't know if such use of addresses is valid. It looks like an abuse to me.