Working with pointers/adresses

[Quantium via Digitalmars-d-learn]

I'm learning now memory usage in D, and I have the problem that I 
can't solve.
The problem is (The third step):
1) Programm gets number (In int format) as input data.
2) Integer is converted to HEX
3) Programm gets the data in 0x<Integer converted to HEX> memory 
slot and writes it in the console.