HP-42s Entering 4 complex numbers on the stack

[J-F Garnier]

(05-28-2023 01:38 PM)Vincent Weber Wrote:  Regarding the 32S/32SII, I like the simplicity or the complex numbers handling, but I think it is half-baked:
-A stack reduced to 2 elements;
-No way to operate this stack like the normal one: no complex X<>, lastX,etc...;
-Missing math functions, e.g. reverse trigs.

I agree, the 32SII has serious limitations for complex number handling.
I'm particularly missing CMPLXx^2 and CMPLXSQR. It can be computed with the help of CMPLXy^x but it's quite tedious and uses all the stack.
Note however, that CMPLXx<>y can be done with Rv Rv
(I long ago asked for a way to do CPMLXENTER as a challenge).


Back to the 42S:

Quote:What do you think of my way?

It's a fine idea but it uses a variable CSTK. Can you design a solution with the matrix on the stack?
I don't remember if a solution without a extra variable/register was ever found.

J-F