Calculators with C?

[Helix]

(03-11-2017 05:01 PM)Dave Britten Wrote:  I run TurboC on my 200LX. Does that count?

Definitely! With its large 640x200-pixel screen and its QWERTY + numerical keyboard, the HP 200LX is very comfortable for writing programs.

On the TI 92 Plus / Voyage 200 / 89 / 89 Titanium (not sure about the latter), it is possible to run GTC, an on-calc compiler. However, it doesn't support float and double variables, so I think it is rather limited.

The following is probably off topic, but there are several interesting interpreted languages available for the TI Nspire CX CAS. Lua seems extremely fast, is supported by TI, and can be used on-calc with a good third party Lua editor.
It is also possible to add new languages with Ndless, which is a "jailbreak". When it is installed, one can use on-calc JavaScript and Micro Python.