newbie question

[JD123]

For a password, I'd use logic like this:

(Every key pressed sends "#" so that someone looking over your shoulder can't see what you entered.)

password is a an array that you setup and holds the password value

for i = 0 to 3 'for 4 digit password
read keys
if no key, re-read keys
if key pressed <> password[i] then fail = 1
send LCD "#", no CR of LF
next i

if fail = 0 then go forward, else LCD "FAIL" (or something), clear LCD, fail = 0 and go back to password loop


This only the logic flow, not verbatim code.