How to add optional parameters to functions?

[HasteBro]

I'm currently going over my personal function library, making it smaller/smarter. I have a function for adventuring with specific settings (fam, fam equip, location and amount of adventures), and I thought it would be nice to add another parameter for adding a goal, but I want that parameter to be optional (like the boolean buy function being able to handle coinmasters optionally). How do I go about doing that?


Here's the function:

boolean famadventure ( familiar fam, item fe, location l, int adv )
	{
		if(fam.have_familiar())
		{
			use_familiar(fam);
			equip($slot[familiar], fe);
			adventure(adv, l);
			if(!have_equipped(fe))
			{
				equip($slot[familiar], $item[none]);
			}
		}
	
		if(!fam.have_familiar())
		{
			print("You don have a "+ fam +". Unable to adventure.");
		}
		return(true);
	}

 

[slyz]

You have to override your original function, like this:

boolean famadventure( familiar fam, item fe, location l, int adv  )
{
	if(fam.have_familiar())
	{
		use_familiar(fam);
		equip($slot[familiar], fe);
		adventure(adv, l);
		if(!have_equipped(fe))
		{
			equip($slot[familiar], $item[none]);
		}
	}

	if(!fam.have_familiar())
	{
		print("You don have a "+ fam +". Unable to adventure.");
	}
	return(true);
}
boolean famadventure ( familiar fam, item fe, location l )
{
	return famadventure( fam, fe, l, 0 );
}
boolean famadventure ( familiar fam, item fe )
{
	return famadventure( fam, fe, $location[ none ], 0 );
}
boolean famadventure ( familiar fam )
{
	return famadventure( fam, $item[ none ], $loation[ none ], 0 );
}

EDIT: Right... you "overload" your function, you don't "override it".

 

[lostcalpolydude]

The simplest way is to make another function with 5 parameters. The 4-parameter function would just call the 5-parameter function with a default value for the fifth parameter.

 

[Winterbay]

You need to create an overloaded function (same name, different amount or types of parameters). Say you want to have the option to add a combat filter to your function above then you could do:

boolean famadventure ( familiar fam, item fe, location l, int adv, string combat ) { 	if(fam.have_familiar()) 	{ 		use_familiar(fam); 		equip($slot[familiar], fe); 		if(combat == "")
		{
			adventure(adv, l);
		}
		else
		{
			adventure(adv, l, combat);
		} 		if(!have_equipped(fe)) 		{ 			equip($slot[familiar], $item[none]); 		} 	}  	if(!fam.have_familiar()) 	{ 		print("You don have a "+ fam +". Unable to adventure."); 	} 	return(true); }


boolean famadventure ( familiar fam, item fe, location l, int adv )
{
	return famadventure ( familiar fam, item fe, location l, int adv , "");
}

 

[Bale]

And that is how slyz became known as the Ninja Scripting King.

 

[HasteBro]

I see, thanks!