Using "If then" and "and" together

[HenrikOlsson]

Hi,
I tried four examples here, compiled for a 16F628.
First test:

  IF CODE_ONE = 13 and CODE_TWO = 13 and CODE_THREE = 16 and CODE_FOUR = 21 and CODE_FIVE = 32 THEN
   'Correct code
  ENDIF

Result: 75 WORDS

Second test:

If CODE_ONE = 13 THEN
 IF CODE_TWO = 13 then
   if CODE_THREE = 16 then
     if CODE_FOUR = 21 then
       if CODE_FIVE = 32 THEN
       'correct code
       Endif
     endif
   endif
 endif
endif

Result: 26 WORDS

Third test:

IF CODE_ONE <> 13 THEN EXIT_TO_ERROR
IF CODE_TWO <> 13 THEN EXIT_TO_ERROR
IF CODE_THREE <> 13 THEN EXIT_TO_ERROR
IF CODE_FOUR <> 13 THEN EXIT_TO_ERROR
IF CODE_FIVE <> 13 THEN EXIT_TO_ERROR
'correct code

EXIT_TO_ERROR:

RESULT: 26 WORDS (same as test 2)

Forth test:
This one uses an array to hold the entered code and assumes that the correct password sequence is stored in EEPROM, starting at location 0

Correct = 1
For i = 0 to 4
 Read i, Password
  if Code[i] <> Password THEN
    Correct = 0
  ENDIF
NEXT
If Correct THEN
'correct code
endif

RESULT: 41 WORDS

So between these four method 2 or 3 produces the smallest code - by far. Personally I think Aerostars suggestion is the easiest to read but that might just be me...

/Henrik.