C++ to D: Help please

[bearophile]

%u:

> I am hoping that one of you experienced programmers out
> there could lend me a hand converting this small program to D.

If you show specific problems some people here will try to help. But I think most people are not willing to translate a multi-module C++ program to D for you. If you aren't able to translate that, start from something smaller, like 10-lines long console programs, implement some of the missing ones here:
http://rosettacode.org/wiki/Reports:Tasks_not_implemented_in_D

Bye,
bearophile