import std.stdio, std.container.array, core.memory;

​

extern(C) void* sbrk(long);

​

void main(string[] args)

{

    auto start_sbrk = sbrk(0);

    writeln("start sbrk: ", start_sbrk);

    size_t length;

    int[] arr;

    arr ~= 1;

    writeln("arr.ptr:\t", arr.ptr);

    auto arr1 = arr.dup;

    writeln("arr1.ptr:\t", arr1.ptr);

    auto addr_of_length = &length;

    writeln("lenaddr:\t", addr_of_length);

    void heapOrStack(void* ptr)

    {

        if (ptr > start_sbrk)

            write(" stack");

        else 

            write(" heap");

    }

    write("lenaddr:\t");

    heapOrStack(cast(void*)addr_of_length);

    writeln;

    write("arr.ptr:\t");

    heapOrStack(cast(void*)arr.ptr);

    writeln;

    write("arr1.ptr:\t");

    heapOrStack(cast(void*)arr1.ptr);

    writeln;

}