Pass a variable using the function without having global var

[leo73]

If i have this program:
__________________________________________________________________________-
program ProvaPassaggioVariabilr16F88

dim y as byte '<--- I don't want use this global Variable

' Declarations section
sub function funzione(dim x as byte) as byte ' DefineCircle function returns a byte value
result = x
end sub

main:
'dim y as byte <---- i want use the variable here as local(what about save memory pic) but compiler see me an error

' Main program
y = funzione(5)
nop
end.
__________________________________________________________________________

why? is required declare the variable as Global, and i can't use it as local where i need? it's ridicolous!!!
thank you.
Leonardo

[janni]

why? is required declare the variable as Global, and i can't use it as local where i need? it's ridicolous!!!

It isn't required to declare y as global. Optimizer probably removed this variable (and assignment) when declared as local because it wasn't used later on. For debugging, when you want optimizer to refrain from optimizing out a variable, use the volatile specifier, like

Code: Select all

main:
 dim y as byte volatile