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Hello Everyone,
I understand the difference between & vs &&, and I understand >= , <= , but what is the difference between = , and ==, is this just some "C" sneaking into peoples code or is there an esoteric difference here ? Or did I just miss that page in DAS BOOK ? As a comparison operator is there a difference ?
Bewildered
As a comparision operator they both do the same thing.
As a statement only "=" will work.
Why the MeLabs folks did it this way is anyones guess.
Thanks Dave, I pretty much thought so, Never tried using double = as a statement, so that's good to know too.
Ok I just found this, re: double equal sign in " C "
Is this true for PBP ?Quote:
From Jan 2010 Circuit Cellar
author: George Martin
page 70
"Consider the statements if (a=b) and if (a==b). Both are
correct, but they are vastly different operations. The former copies the
value of variable b into variable a, and then if that value
is nonzero (TRUE) it executes the next statement. The latter compares
variable a to variable b . If they are equal, then the next
statement is executed. It is a common mistake to leave out the double
equal sign."
PBP
Generated ASMCode:XRUN:
IF (A == B) THEN X = Z
RUNX:
IF (A = B) THEN X = Z
Looks the same to me..Code:LABEL?L _XRUN
CMPNE?BBL _A, _B, L00001
MOVE?BB _Z, _X
LABEL?L L00001
LABEL?L _RUNX
CMPNE?BBL _A, _B, L00003
MOVE?BB _Z, _X
LABEL?L L00003
C != pbp . . . . .
That will not compile...Quote:
Originally Posted by Joe S.
Can not use a comparison operator as a statement.... :D
You're right! it should beQuote:
Originally Posted by mackrackit
main:
If C != PBP Then Gosub buy
goto main
Buy:
Buy PBP
return
:cool: