[Tutorial] Using a variable - Printable Version

[Tutorial] Using a variable - Printable Version

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Using a variable - Pawnstar - 21.11.2012

Today i will show you how to use a variable.

//////////////////////////////////////

Firstly we will need to create one, We also want to make it a Global variable as we will be using it in two functions. So go into your gamemode and before your first function we want to add:

pawn Код:

new variablename;

In this example of using a variable, i will be making the server tell us how many players are logged in after each new player connects.

So i will name my variable: playersonline

pawn Код:

new playersonline=0;

We will be using an integer variable, And set the value to 0. (We want the server to count how many players are online so we wouldn't set it as 3.)

So now we have created our variable, Lets make some use of it. Since we are checking how many players have connected, We will go to the function

pawn Код:

public OnPlayerConnect

Now inside the function we will want to add either:

#1

pawn Код:

playersonline++;

or we can use
#2

pawn Код:

playersonline +=1;

Personally i think #1 looks more presentable.

What this will do is add a value of +1 to the variable every time someone connects to the server.

Now we want to add this data to a string, So below that add:

pawn Код:

new string[128];

it is not recommended to use a higher value then 128 as a cell value.
now we will want to format the string, So again below that add:

pawn Код:

format (string, sizeof(string), "There is now %d players logged in.", playersonline);

Okay so what this has done is basically added the data from the playersonline variable to a string of text (currently the text won't be sent to anyone we will add that in a minute)

We added %d so it will grab the data from whatever variable is after the comma, If we wanted to add two bits of data from two different variables we would do this

Код:

format (string, sizeof(string), "There is now %d players logged in.%d", playersonline, examplevariable);

When you format a string, It will grab the data from the first variable called and will enter it at the first %d, Then the next at the next. I color coded it to show how it will call it in which order.

Now we want to notify every player how many players are online so we will add this below:

pawn Код:

SendMessageToAll(0xFF0000FF, string);

Or if you want it to only get sent to the player who just logged in you could use:

pawn Код:

SendClientMessage(playerid, 0xFF0000FF, string);

Now that is done, But what if a player leaves? The data will be inaccurate. So we will need to add this variable to our OnPlayerDisconnect function:

pawn Код:

playersonline--;
new string[128];
format(string, sizeof(string), "There is now %d players logged in", playersonline);
SendClientMessageToAll(0xFF0000FF, string);

As you can see alls we changed was

playersonline++;
to
playersonline--;

But thats pretty self explanatory.

/////////////////////////////////

That is the end of my tutorial, Thank you for reading and i hope it helps.

Re: Using a variable - Lean - 21.11.2012

Not SendMessageToClient
It is SendClientMessage(playerid, COLOR_RED, Welcome);

Re: Using a variable - Pawnstar - 21.11.2012

Ahh my bad, Wasn't thinking right then -.- Course it is thanks!

Re: Using a variable - The King's Bastard - 21.11.2012

******, why isn't using upper camel case not enough for global variables?
Lower case variables would then be locals and method params...