Arbitrary CONST values

[ahenry3068]

I think also I may have found a small bug... 


To demonstrate : 

Code: (Select All)

CONST True = 1

CONST False = NOT True '// Therefore anything not 1 = FALSE



PRINT "My false is = 0 so as False is supposed to be anything thats not true lets see if 0 = False!"



FOR i% = 0 TO 15

  PRINT True, False '// Lets see if they stay the same

  IF 0 = False THEN PRINT "0 = false" ELSE PRINT "0 whilst not being = true is not actually false!"

NEXT

I noticed it a while back when using flags to control gl without using a SPECIFIC True Value. Just saying True = not false, my Gl loop would run when it shouldn't...is it a bug or expected behaviour....

John



    I understand your confusion but this is expected and how almost all BASIC's act.

NOT in BASIC is BITWISE not logical      


1 as an int is   &B0000000000000001


NOT 1 is &B1111111111111110


  This is a non zero value and acts as TRUE.


Only NOT -1 ends up being 0   So TRUE should be -1   



BTW: In QB64PE 4.2    _TRUE & _FALSE are already pre defined so just use those. 

Try this code.  

Code: (Select All)

FOR I = -2 to 3

        print _BIN$(NOT I)

NEXT