sscanf - optional number? - Printable Version

sscanf - optional number? - Printable Version

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+--- Thread: sscanf - optional number? (/showthread.php?tid=288283)

sscanf - optional number? - Jack_Leslie - 07.10.2011

How do you have an optional number with sscanf?

I have,

pawn Код:

new action[128], item[128], amount;
    
    if(sscanf(params, "s[128]z[128]d", action, item, amount))
    {
        SendClientMessage(playerid, COLOR_GREY, "* Usuage: /car [syntax]");
        SendClientMessage(playerid, COLOR_GRAD2, "* Syntax: Check");
        SendClientMessage(playerid, COLOR_GRAD3, "* Syntax: Put - pot crack mats weapon");
        SendClientMessage(playerid, COLOR_GRAD4, "* Syntax: Get - pot crack mats weapon");
        return 1;
    }

And then,

pawn Код:

if(strcmp(action, "check") == 0)
    {
        if(!amount)
        {
            new pot, crack, mats, gun1, gun2, gun3;
            pot = CarInfo[car][vPot], crack = CarInfo[car][vCrack], mats = CarInfo[car][vMats];
            SendClientMessage(playerid, COLOR_GREY, "__________ Car Storage __________");
            format(string, sizeof(string), "Crack: %d - Pot: %d - Materials: %d", crack, pot, mats);
            SendClientMessage(playerid, COLOR_GRAD2, string);
        }
        return 1;
    }

But if I do /car check then it doesn't work..

Re: sscanf - optional number? - [MWR]Blood - 07.10.2011

pawn Код:

if(sscanf(params, "S[128]Z[128]D", action, item, amount))

Just put caps on the param(s) that you want to be optional.

Re: sscanf - optional number? - Jack_Leslie - 07.10.2011

Cheers mate, that worked. How do I check if nothing is entered in the option string if I want something to be entered?

I tried:

pawn Код:

if(!strlen(item)) return SendClientMessage(playerid, COLOR_GREY, "* Usuage: /car put [item] [amount]");

But it didn't work, I also tried just if(!item) but that didn't work neither.

Re: sscanf - optional number? - iggy1 - 07.10.2011

You mean you want default values on the params? or just check if params is null?

Re: sscanf - optional number? - [MWR]Blood - 07.10.2011

Use

pawn Код:

if(isnull(params))

Re: sscanf - optional number? - iggy1 - 07.10.2011

Default values are enclosed in parentheses.

pawn Код:

if(sscanf(params, "S[128](default string)S[128](another string)D(500)", action, item, amount))

Result is; action = "default string", item = "another string" and amount = 500. If no params were entered. Also assuming your using the plugin.

Quote:

Originally Posted by [MWR]Blood

Use

pawn Код:

if(isnull(params))

He is already using sscanfs inbuilt null check in his code...

Re: sscanf - optional number? - Jack_Leslie - 07.10.2011

Quote:

Originally Posted by iggy1

Default values are enclosed in parentheses.

pawn Код:

if(sscanf(params, "S[128](default string)S[128](another string)D(500)", action, item, amount))

Result is; action = "default string", item = "another string" and amount = 500. If no params were entered. Also assuming your using the plugin.

action = needed string
item = optional string
amount = needed value if item is entered

I get undefined symbol on isnull, why? :S

Re: sscanf - optional number? - iggy1 - 07.10.2011

Quote:

Originally Posted by Jack_Leslie

action = needed string
item = optional string
amount = needed value if item is entered

I get undefined symbol on isnull, why? :S

DW your sscanf line IS checking if params is null. You dont need to use "isnull" in this case. BTW which command processor are you using?

Re: sscanf - optional number? - Jack_Leslie - 07.10.2011

Quote:

Originally Posted by iggy1

DW your sscanf line IS checking if params is null. You dont need to use "isnull" in this case.

Oh right okay so I'm not using isnull, however, if I put a action item and no amount, the default amount is 114, but it should send the message syntax: /car put or whatever I want to send?