(42S) Hill's Encryption System

[Gerald H]

Thank you Thomas for your suggestion.

While your programme gives correct results the returned numbers respect the sign of elements of the matrix, whereas the built-in function MOD returns positive answers for a positive base, which values the cyphering processes depend on.

Consequently not utile for this set of programmes.

I prefer the programme below, it may avoid problems with non-integer outputs of your programme - however, still respects sign of input:

Code:

00 { 20-Byte Prgm }
01▸LBL "MMOD"
02 FIX 00
03 RCL÷ ST Y
04 FP
05 RCL* ST Y
06 RND
07 ALL
08 END