Global And Function Issues

[BlueScreen]

Global $a
Global $b
Global $c

Action (2,4,7)
Msgbox (0,"first number",$a)
Msgbox (0,"second number",$b)
Msgbox (0,"third number",$c)


Func Action ($a, $b, $c)
Msgbox (0,"Sum is",$a+$b+$c)
Endfunc

Why can't I see the values of $a,$b,$c once the function was executed?

What can I do to see the values?

10x

[ezzetabi]

Global $a
Global $b
Global $c

Action (2,4,7)
Msgbox (0,"first number",$a)
Msgbox (0,"second number",$b)
Msgbox (0,"third number",$c)


Func Action (byref $a, byref $b, byref $c)
Msgbox (0,"Sum is",$a+$b+$c)
Endfunc

Why can't I see the values of $a,$b,$c once the function was executed?

What can I do to see the values?

10x

Try this!

[ezzetabi]

Ripped from help file, that everyone should read..

The ByRef keyword is optional and means: (1) the parameter must a variable, and (2) the variable could be changed by the function. By default, a parameter is passed by value which means that a copy of the parameter's value is manipulated by the function.

[BlueScreen]

Sorry, but it doesn't seem to work.

[Jos]

The Byref in this casse will give you an error unless you specify Vars in the statment that calls "Action".

Think you are mixing up some logic here.

You define global vars but still define them in Action ($a,$b,$c) and i believe they will be LOCAL vars when you define them on the func statement.

So this would work:

Global $a=2
Global $b=4
Global $c=7
Action ()
Msgbox (0,"first number",$a)
Msgbox (0,"second number",$b)
Msgbox (0,"third number",$c)

Func Action ()
   Msgbox (0,"Sum is",$a+$b+$c)
Endfunc

[BlueScreen]

10x JdeB, but I must use some parameters in the function: "Action (2,4,5)"

Can't do: "Action ()"

Is there another way?

[BlueScreen]

You define global vars but still define them in Action ($a,$b,$c) and i believe they will be LOCAL vars when you define them on the func statement.

Right. The 3 globals are not necessary

[Jos]

Something like this maybe? ( I am a bit lost as to what you need to accomplish...)

Global $a
Global $b
Global $c

Action (2,4,7)
Msgbox (0,"first number",$a)
Msgbox (0,"second number",$b)
Msgbox (0,"third number",$c)


Func Action ($a2, $b2, $c2)
   $a=$a2 
   $b=$b2
   $c=$c2
Msgbox (0,"Sum is",$a+$b+$c)
Endfunc

[BlueScreen]

Gr8. This is good.

So I guess there is no other way to use a variable declared by a function <Action (2,6,8)> rather than doing the $...=$... tweak inside the function.

But this is good enough.

10x alot.

[Valik]

Action(1, 2, 3)
MsgBox(4096, "", $a & @LF & $b & @LF & $c)

Func Action($a, $b, $c)
    Global $a = $a
    Global $b = $b
    Global $c = $c
EndFunc

But I question the entire logic of needing to assign global variables by passing them to a function. Why use a function? Why pass parameters?

Edited April 2, 2004 by Valik