Taknig a number away (minus) - Printable Version

Taknig a number away (minus) - Printable Version

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+--- Thread: Taknig a number away (minus) (/showthread.php?tid=526891)

Taknig a number away (minus) - Cole_William - 19.07.2014

So i been looking all over for a way to minus a number in a users file like

Ignore indenting, it looked all messed up with it when posting.

pawn Код:

if(PlayerInfo[playerid][pCash] < 500)
{
SendClientMessage(playerid, COLOR_GREY, "You don't have enough money");
RemovePlayerFromVehicle(playerid);
}
GivePlayerMoney(playerid, -500);
PlayerInfo[playerid][pRenting] = 1;
SendClientMessage(playerid, COLOR_GREEN, "Enjoy your ride!");
PlayerInfo[playerid][pCash] = 1;

I want PlayerInfo[playerid][pCash] = 1; to minus 500 from their current amount, how do we do this?

Re: Taknig a number away (minus) - Hanger - 19.07.2014

Код:

Operator	 Meaning						 Usage
==	 	 Left is equal to Right				 if (Left == Right)
!=		 Left is not equal to Right			 if (Left != Right)
>		 Left is greater than Right			 if (Left > Right)
>=		 Left is greater than or equal to Right	 	 if (Left >= Right)
<		 Left is less than Right			 if (Left < Right)
<=		 Left is less than or equal to Right		 if (Left <= Right)

-=		 Minus		 		 		 Variable -= 10
+=		 Plus		 		 		 Variable += 10
=		 Assign a value to variable	 		 Variable = 10

Re: Taknig a number away (minus) - sammp - 19.07.2014

The method of doing this is really simple.

You might want to make this on your OnPlayerUpdate: Easy way of stopping money hacks

pawn Код:

if(GetPlayerMoney(playerid) != Player[playerid][Money])
        {
            ResetPlayerMoney(playerid);
            GivePlayerMoney(playerid, Player[playerid][Money]);
        }
        if(GetPlayerScore(playerid) != Player[playerid][Level])
        {
            SetPlayerScore(playerid, 0);
            SetPlayerScore(playerid, Player[playerid][Level]);
        }]

Change the variables, obviously.

Then, rather than your method you can do this:

pawn Код:

if(PlayerInfo[playerid][pCash] < 500) return SendClientMessage(playerid, COLOR_GREY, "You don't have enough money");
PlayerInfo[playerid][pRenting] = 1;
SendClientMessage(playerid, COLOR_GREEN, "Enjoy your ride!");
PlayerInfo[playerid][pCash] -= 500;

Using the -= operator we can take a value away from a variable.

Don't do this, an exception will occur:

pawn Код:

PlayerInfo[playerid][pCash] - 500;

Re: Taknig a number away (minus) - Cole_William - 19.07.2014

Quote:

Originally Posted by Hanger

https://sampforum.blast.hk/showthread.php?tid=175275

So i just do

PlayerInfo[playerid][pCash] = -1; ?? But if i do that it just sets their money to -1 instead of minus 1.

Re : Taknig a number away (minus) - S4t3K - 19.07.2014

No.

To take a number away from a variable, use the "-=" operator.

pawn Код:

main()
{
      new var = 84:
      var -= 3;
      printf("%d", var);
}

Output : 81.

Re: Taknig a number away (minus) - sammp - 19.07.2014

Quote:

Originally Posted by Cole_William

So i just do

PlayerInfo[playerid][pCash] = -1; ?? But if i do that it just sets their money to -1 instead of minus 1.

look at my comment

Re: Taknig a number away (minus) - Hanger - 19.07.2014

Edited my part, look again @ second post

Re: Taknig a number away (minus) - Cole_William - 19.07.2014

Quote:

Originally Posted by sammp

The method of doing this is really simple.

You might want to make this on your OnPlayerUpdate: Easy way of stopping money hacks

pawn Код:

if(GetPlayerMoney(playerid) != Player[playerid][Money])
        {
            ResetPlayerMoney(playerid);
            GivePlayerMoney(playerid, Player[playerid][Money]);
        }
        if(GetPlayerScore(playerid) != Player[playerid][Level])
        {
            SetPlayerScore(playerid, 0);
            SetPlayerScore(playerid, Player[playerid][Level]);
        }]

Change the variables, obviously.

Then, rather than your method you can do this:

pawn Код:

if(PlayerInfo[playerid][pCash] < 500) return SendClientMessage(playerid, COLOR_GREY, "You don't have enough money");
PlayerInfo[playerid][pRenting] = 1;
SendClientMessage(playerid, COLOR_GREEN, "Enjoy your ride!");
PlayerInfo[playerid][pCash] -= 500;

Using the -= operator we can take a value away from a variable.

Don't do this, an exception will occur:

pawn Код:

PlayerInfo[playerid][pCash] - 500;

Thanks for the help!

Re: Taknig a number away (minus) - sammp - 19.07.2014

Quote:

Originally Posted by Hanger

Edited my part, look again @ second post

Just saying += doesn't just mean "add"

It means addition assignment.

Things like +=, -=, *= etc are all called Compound assignment operators.
Things like +, -, * etc are all called Arithmetic operators.