// todo (void*) is a void pointer, which type cast any data type variable to point the address of it's own, but it doesn't store the information about data type of variable. // todo When we make a ...

// semantics: function "GetZ()" returns an int pointer which cannot be modified (1-st "const") as well as its contents (2-nd "const"), where the fucntion itself "promises NOT TO MODIFY (READ ONLY)" ...