D语言指向指针的指针

import std.stdio;  

const int MAX = 3;

void main () { 
   int var = 3000; 
   writeln("Value of var :" , var); 

   int *ptr = &var; 
   writeln("Value available at *ptr :" ,*ptr); 

   int **pptr = &ptr; 
   writeln("Value available at **pptr :",**pptr); 
}