Working with pointers/adresses

[Paul Backus]

On Wednesday, 8 July 2020 at 19:48:07 UTC, Quantium wrote:
> 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.

import std.stdio;

void main()
{
     int i;
     readf("%d\n", i); // read a number
     ubyte* p = cast(ubyte*) i; // convert it to a pointer
     writeln(*p); // write the data at that address to the console
}

Note that this program will almost certainly crash if you try to 
run it, since modern computers do not allow programs to read and 
write arbitrary memory locations.