[Tutorial] How to make a calculate command - Printable Version
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+---- Thread: [Tutorial] How to make a calculate command (/showthread.php?tid=453768)
How to make a calculate command - Necip - 26.07.2013
How to make a calculate command
~Introduction
Hello SA-MP scripters. Today I will show you how to make a calculate command using ZCMD(by Zeex), sscanf2(by ******). This is a bit advanced way, so to understand, you shall know the basics of PAWN scripting.
~Requirements
For this tutorial, what you need is sscanf2 and ZCMD.
~Getting started
As I said above, you need to understand a bit of PAWN coding. I suggest you using this if you don't understand something.So what are we waiting? Let's get started.
STEP 1.
First of all, let's include our includes and define 2 colors, White and Grad/Grey.
pawn Код:
// Includes
#include <zcmd>
#include <sscanf2>
// Defines
#define CWHITE 0xFFFFFFAA
#define CGRAD 0xBFC0C2FF
Let's start with creating the command. Here, we will use the command /calculate, so we will do it like this:
pawn Код:
CMD:calculate(playerid, params[])
{
return 1;
}
Let's start with the defining. We will define 4 things. These are: "string" for the Client Messges, "method" for the method of calculating(Multiple, divide etc.), "value1" for the first value and "value2" for the second value.
pawn Код:
CMD:calcullate(playerid, params[])
{
new string[128], method[20], value1, value2;
return 1;
}
STEP 4.
Now, we will use the sscanf function. I can't tell many things for the sscanf, but you may find information for it here.
pawn Код:
CMD:calcullate(playerid, params[])
{
new string[128], method[20], value1, value2;
if(sscanf(params, "ds[20]d", value1, method, value2))
{
SendClientMessage(playerid, CWHITE, "[USAGE]: /calculate [value] [operation] [value].");
SendClientMessage(playerid, CGRAD, "Operations: Add, Subtract, Multiply, Divide.");
return 1;
}
return 1;
}
Now let's start making the command's most necessery things. Here we are going to use the known "strcmp" function. You can find about it here.
pawn Код:
CMD:calcullate(playerid, params[])
{
new string[128], method[20], value1, value2;
if(sscanf(params, "ds[20]d", value1, method, value2))
{
SendClientMessage(playerid, CWHITE, "USAGE: /calculate [value] [operation] [value].");
SendClientMessage(playerid, CGRAD, "Operations: Add, Subtract, Multiply, Divide.");
return 1;
}
if(strcmp(method,"multiply",true) == 0 || strcmp(method,"*",true) == 0)
{
// Continued code below
}
if(strcmp(method,"divide",true) == 0 || strcmp(method,"/",true) == 0)
{
// Continued code below
}
if(strcmp(method,"add",true) == 0 || strcmp(method,"+",true) == 0)
{
// Continued code below
}
if(strcmp(method,"subtract",true) == 0 || strcmp(method,"-",true) == 0)
{
// Continued code below
}
return 1;
}
This is the last step. Now let's add the code where I wrote "Continued code below". I will explain how they work on the code, so take a look at the comments. Also, that's the last code.
pawn Код:
CMD:calculate(playerid, params[])
{
new string[128], method[20], value1, value2;
if(sscanf(params, "ds[20]d", value1, method, value2))
{
SendClientMessage(playerid, CWHITE, "USAGE: /calculate [value] [operation] [value].");
SendClientMessage(playerid, CGRAD, "Operations: Add, Subtract, Multiply, Divide.");
return 1;
}
if(strcmp(method,"multiply",true) == 0 || strcmp(method,"*",true) == 0)
{
new sum = value1*value2; // We create a new define called sum which means the result of valu1 multiplied by value2
format(string,sizeof(string),"%d multiplied by %d equals %d.",value1,value2,sum); // The format of the SendClientMessage
SendClientMessage(playerid,CWHITE,string); // Sends message to the player which the format just above
}
if(strcmp(method,"divide",true) == 0 || strcmp(method,"/",true) == 0)
{
if(value2 == 0) // As Maths say that we can't divide by zero, we can't. So here we shall send him an error message.
{
SendClientMessage(playerid,CWHITE,"ERROR: Cannot divide by zero");
return 1;
}
new sum = value1/value2; // We create a new define called sum which means the result of valu1 divided by value2
format(string,sizeof(string),"%d divided by %d equals %d.",value1,value2,sum); // The format of the SendClientMessage
SendClientMessage(playerid,CWHITE,string); // Sends message to the player which the format just above
}
if(strcmp(method,"add",true) == 0 || strcmp(method,"+",true) == 0)
{
new sum = value1+value2; // We create a new define called sum which means the result of valu1 added to value2
format(string,sizeof(string),"%d added to %d equals %d.",value1,value2,sum); // The format of the SendClientMessage
SendClientMessage(playerid,CWHITE,string); // Sends message to the player which the format just above
}
if(strcmp(method,"subtract",true) == 0 || strcmp(method,"-",true) == 0)
{
new sum = value1-value2; // We create a new define called sum which means the result of valu1 subtraced by value2
format(string,sizeof(string),"%d subtracted by %d equals %d.",value1,value2,sum); // The format of the SendClientMessage
SendClientMessage(playerid,CWHITE,string); // Sends message to the player which the format just above
}
return 1;
}
Credits:
Zeex ~ ZCMD,
****** ~ sscanf,
Necip ~ Tutorial.
Re: How to make a calculate command - iAnonymous - 26.07.2013
Very nice tutorial. .
Everything is explained very clearly.
+repped
Re: How to make a calculate command - Necip - 26.07.2013
Quote:
|
Originally Posted by iAnonymous
 Very nice tutorial. .
Everything is explained very clearly. +repped |
Re: How to make a calculate command - muhsah007 - 25.02.2015
Nice But there is a bug like when someone wants to calculate like that
Example: /calculate 2.5 / 7.4 or /calculate 2.5 * 8.4 or /calculate 2.5 + 8.4
it doesnt work the correct cmd is that which will also support points (x.xx).
PHP код:
CMD:calculate(playerid, params[])
{
new string[128], method[20], Float:value1, Float:value2;
if(sscanf(params, "fs[20]f", value1, method, value2))
{
SendClientMessage(playerid, COLOR_WHITE, "USAGE: /calculate [value] [operation] [value].");
SendClientMessage(playerid, COLOR_GRAD2, "Operations: Add, Subtract, Multiply, Divide.");
return 1;
}
if(strcmp(method,"multiply",true) == 0 || strcmp(method,"*",true) == 0)
{
new Float:sum = Float:value1*Float:value2;
format(string,sizeof(string),"%0.2f multiplied by %0.2f equals %0.2f.",value1,value2,sum);
SendClientMessage(playerid,COLOR_WHITE,string);
}
if(strcmp(method,"divide",true) == 0 || strcmp(method,"/",true) == 0)
{
if(value2 == 0)
return GameTextForPlayer(playerid, "face~r~palm", 1000, 3);
new Float:sum = Float:value1/Float:value2;
format(string,sizeof(string),"%0.2f divided by %0.2f equals %0.2f.",value1,value2,sum);
SendClientMessage(playerid,COLOR_WHITE,string);
}
if(strcmp(method,"add",true) == 0 || strcmp(method,"+",true) == 0)
{
new Float:sum = Float:value1+Float:value2;
format(string,sizeof(string),"%0.2f added to %0.2f equals %0.2f.",value1,value2,sum);
SendClientMessage(playerid,COLOR_WHITE,string);
}
if(strcmp(method,"subtract",true) == 0 || strcmp(method,"-",true) == 0)
{
new Float:sum = Float:value1-Float:value2;
format(string,sizeof(string),"%0.2f subtracted by %0.2f equals %0.2f.",value1,value2,sum);
SendClientMessage(playerid,COLOR_WHITE,string);
}
return 1;
}
Thanks
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