(12C) Signum Function

[rprosperi]

(03-03-2019 02:39 PM)Gamo Wrote:  Program this in ALG mode for 12CP
[÷] [x²] [√x] [=]

123 [R/S] display 123
123 [CHS] [R/S] display 123

Above routine look like ABS function.

Gamo

No, the above program returns -1.00 on a 12CP, as Dieter suspected.

SICNR, I had to try my first algebriac mode program on a 12CP...

Interesting UPDATE:

On the initial 12CP (before the (), Undo and Backspace were added) the above program returns -1.00, but on later models (including the Android emulator) returns 123 as Gamo reported.

Clearly a bug, I need to explore past bug reports. Intuitively, the initial behavior is correct and the later is not, though it seems unlikely such a bug has never been noticed and fixed...