Function with optional parameters

Function with optional parameters - Printable Version

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Function with optional parameters - Miguel - 30.10.2010

Can anyone teach me how to make functions with one or more optional parameters?

Example:

pawn Код:

format(string, sizeof(string), "%s and %s are two strings", var_1, var_2);
format(param_1, param_2, param_3, optional_param_1, optional_param_2, ...); // this function has optional paramters

Re: Function with optional parameters - Cameltoe - 30.10.2010

pawn Код:

stock OptionalParameter(playerid, vehicleid = INVALID_VEHICLEID)
{

}

Re: Function with optional parameters - Miguel - 30.10.2010

I mean those functions that have a "{Float,_}:..." parameter, how do they work?

Re: Function with optional parameters - MadeMan - 30.10.2010

Use functions numargs, getarg, setarg.

Re: Function with optional parameters - Miguel - 30.10.2010

Quote:

Originally Posted by MadeMan

Use functions numargs, getarg, setarg.

Can you tell me how do they work?

Re: Function with optional parameters - MadeMan - 30.10.2010

numargs shows the number of arguments
getarg gets the argument value
setarg sets the argument value

If you have a function like

pawn Код:

SetPlayerData(playerid, ...)

and you call it like this

pawn Код:

new number = 789;
SetPlayerData(playerid, 45, 1235, number);

numargs() is 4
getarg(0) is playerid
getarg(1) is 45
getarg(2) is 1235
getarg(3) is 789 (because number = 789)
setarg(3, 0, 123) sets 'number' to 123

There is also an example on the wiki

https://sampwiki.blast.hk/wiki/ResetPlayerWeaponsEx

Re: Function with optional parameters - Miguel - 01.11.2010

Thank you very much, I owe you a cookie!