SA-MP Forums Archive
Passing a variable by reference using SetTimerEx - Printable Version

+- SA-MP Forums Archive (https://sampforum.blast.hk)
+-- Forum: SA-MP Scripting and Plugins (https://sampforum.blast.hk/forumdisplay.php?fid=8)
+--- Forum: Scripting Help (https://sampforum.blast.hk/forumdisplay.php?fid=12)
+--- Thread: Passing a variable by reference using SetTimerEx (/showthread.php?tid=653545)


Passing a variable by reference using SetTimerEx - mongi - 06.05.2018

So I'm trying to pass a variable by reference to a function using SetTimerEx and I'm just getting a messy result.
I cannot find where I fucked up and I searched about this and didn't find a thing, Help?

PHP код:
new TEST = 5;
forward decrease(&n);
public decrease(&n)
{
    printf("%i", n);
}
public OnGameModeInit()
{
    SetTimerEx("decrease", 1000, true, "i", TEST);
    return 1;
} 
Console:
PHP код:
[22:19:20] 33554432
[22:19:21] 33554432
[22:19:22] 33554432
[22:19:23] 33554432
[22:19:24] 33554432
[22:19:26] 33554432
[22:19:27] 33554432
[22:19:28] 33554432
[22:19:29] 33554432
[22:19:30] 33554432
[22:19:31] 33554432
[22:19:32] 33554432
[22:19:33] 33554432 


Re: Passing a variable by reference using SetTimerEx - kovac - 06.05.2018

PHP код:
new TEST = 5;
forward decrease();
public decrease()
{
    TEST--;
    printf("%i", TEST);
    return 1;
}
public OnGameModeInit()
{
    SetTimer("decrease", 1000, true);
    return 1;
} 
Is this what you want to do? I might misunderstood.

Edit:
Or maybe like this:
PHP код:
new TEST = 5;
forward decrease(amount);
public decrease(amount)
{
    TEST -= amount;
    printf("%i", TEST);
    return 1;
}
public OnGameModeInit()
{
    new amount = 1;
    SetTimerEx("decrease", 1000, true, "i", amount);
    return 1;
} 


Re: Passing a variable by reference using SetTimerEx - jasperschellekens - 06.05.2018

format a string before printing it to get the right value.

PHP код:
new TEST = 5; 
forward decrease(&n); 
public decrease(&n) 
{ 
    new str[128];
    format(str, sizeof(str), "%i", n);
    printf(str); 
} 
public OnGameModeInit() 
{ 
    SetTimerEx("decrease", 1000, true, "i", TEST); 
    return 1; 
} 


Re: Passing a variable by reference using SetTimerEx - Jefff - 06.05.2018

Remove & mongi

Re: Passing a variable by reference using SetTimerEx - mongi - 06.05.2018

Quote:
Originally Posted by jasperschellekens
Посмотреть сообщение
format a string before printing it to get the right value.

PHP код:
new TEST = 5; 
forward decrease(&n); 
public decrease(&n) 
{ 
    new str[128];
    format(str, sizeof(str), "%i", n);
    printf(str); 
} 
public OnGameModeInit() 
{ 
    SetTimerEx("decrease", 1000, true, "i", TEST); 
    return 1; 
} 
Still the same, It doesn't even print the correct value.



@kovac

Later on I'll have more variables which I would like to start decreasing 1 till they reach 0 so I want to pass the var. which i'm going to decrease to the function.
Doing it manually works
PHP код:
decrease(TEST); 
but I need it via a timer.

Re: Passing a variable by reference using SetTimerEx - NaS - 07.05.2018

Public functions that have arguments which are passed by reference expect a variable (or array) as input, not a number.

If you do

Код:
decrease(5);
the compiler will give you an error:

Quote:

error 035: argument type mismatch (argument 1)
And that's basically what SetTimerEx does - the timer does NOT pass the "TEST" variable like you expected it to do, it attempts to pass its value (5) which does not work.

Re: Passing a variable by reference using SetTimerEx - Nero_3D - 07.05.2018

You can if you pass the correct address, for example by using ref from amx_memory
PHP код:
SetTimerEx("decrease", 1000, true, "i", ref(TEST)); 
SetTimerEx is just limited to global / static variables, local variables would be out of scope
CallLocalFunction works also with local ones

Re: Passing a variable by reference using SetTimerEx - mongi - 07.05.2018

Quote:
Originally Posted by Nero_3D
Посмотреть сообщение
You can if you pass the correct address, for example by using ref from amx_memory
PHP код:
SetTimerEx("decrease", 1000, true, "i", ref(TEST)); 
SetTimerEx is just limited to global / static variables, local variables would be out of scope
CallLocalFunction works also with local ones
Passing the address to the function using ref fixed it, I guess the function kept taking "TEST"'s value and considered it as an address which just messed up.