Can I Allocate a specific memory address using pointers in c++?

Question

Can I Allocate a specitic memory address using pointers in c++ ?

For example: Allocate This memory address 25D4C3FA and put 4 in it.

Answer 1

Assuming that by allocate you actually mean access,

You can, but if the address is invalid or not accessible then deferencing the address will result in Undefined Behavior.
So it is not a good idea to do so.