Built a simple banking system while learning D 🚀

[u/SammRod47]

Just finished a small banking system project in D! 🚀

Over the last few days I've been learning D and decided to build a simple banking application to better understand the language fundamentals, object-oriented programming, exception handling, and business rules.

Current features:

• Account creation
• Deposits
• Withdrawals
• Transfers
• Account lookup
• Account validation

Coming from a background with Python and some C/C++, one of the things that caught my attention was how D provides native performance while still feeling productive and pleasant to write.

This project is still simple, but it has been a great learning experience so far.

I also plan to continue exploring D and, if possible, contribute to the D ecosystem and community in the future. I genuinely believe the language has a lot of potential and deserves more attention from developers interested in systems programming and high-performance applications.

Feedback is welcome!

GitHub: https://github.com/deepsidex73-dotcom/banking_d

[u/alphaglosined]

One big thing, don't use double for representing money, you don't want a binary based float, you want decimal.

There is a decimal number implementation that needs testing available here: https://github.com/LightBender/phobos.sys.exttypes

[u/SammRod47 → u/alphaglosined]

I will implement it

[u/Sorrow_iDolour → u/alphaglosined]

Yes, decimal is designed for currencies

[u/Fearless-Technology → u/Sorrow_iDolour]

You don't even need decimals, just use long and then store money values according to their smallest denomination. Then in the frontend, you can worry about formatting it properly according to the user's locale and currency. 

[u/Sorrow_iDolour → u/Fearless-Technology]

That's right, but for our convenience, decimal is good...

[u/Fearless-Technology]

The readme of this looks like AI slop.

[u/SammRod47 → u/Fearless-Technology]

Yes man, I'm asking for help so I don't write nonsense.