Q: Good Developer-based calculator?

[bilbo]

If you're not faint of heart, if you have Windows10, and if you want to spend half an hour of genuine amusement, I would suggest you to try CALC, not CALC for Windows, but the one for Linux! It's a command-prompt C-style calculator, with arbitrary precision, open-source, scriptable, and with a lot of functions built-in.

These are the steps to follow:

(1) Install the Linux SubSystem. Yes! Not a Virtual Machine! Look here

(2) Install the Ubuntu command-prompt from the Microsoft App Store (here)

(3) update the packages list: "apt-get update"

(4) install "links2", a command prompt oriented browser: "apt install links2"

(5) download the calc RPM: "links2 http://www.isthe.com/chongo/src/calc/calc-2.12.6.6-12.x86_64.rpm"

(6) install "alien", the new RPM manager: "apt install alien"

(7) install CALC and related libraries: "alien -i calc-2.12.6.6-12.x86_64.rpm"

(8) extend the path where the shared libraries are looked for:

LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib64
export LD_LIBRARY_PATH
ldconfig

(9) You can finally execute CALC

At the end of all this, you will not only have CALC, but a full working Linux subsystem. You can also install the compiler, if you want... "apt install gcc"

Best regards
bilbo