I want buy 49G+, so I have some questions:
1. Is possible to create dialogs similar to TI-89 (strings, inputs and outputs in one dialog) ?
VPN: INPUT and INFORM commands are quite close
VPN: download
2. Can I create user-defined menu?
{ COS { "CSC" << INV COS >> }
{ "Three" { Normal left.shift right.shift }}
MENU
3. Functions, that are be able to return value directly, not only into variable (like ClassPad).
VPN: That's the way they usually work
VPN: << -> y x << x LN y LN / EVAL >> >> 'yLOGX' STO
4. Possibility to store and recall variables from SD card by commands in programs.
:SD:"DOSDIR/SUBDIR/VAR" RCL or STO
:3: { DOSDIR SUBDIR VAR } RCL or STO
5. Functions similar to TI: Try - EndTry and ClrErr.
IFERR..THEN..END
IFERR..THEN..ELSE..END
also
# errnh DOERR
# errn.dec DOERR
# "User String" DOERR
and
in the HOME directory you can have STARTERR -a custom errorhandler.
BUT
*do not use it*
until you have mastered the programming
or you may end up in an endless error loop
# VPNh