[API]

This is an example of easy player tracking with SHVector.

#pragma semicolon 1

#include <sourcemod>
#include <shvector>

// Vector Handles
new Handle:vecPlayers;

public Plugin:myinfo = 
{
    name = "Example Player Tracking",
    author = "PimpinJuice",
    description = "An example of easy player tracking using SHVector.",
    version = "1.0.0",
    url = "http://pimpinjuice.net/"
};

public OnPluginStart()
{
    vecPlayers=SHVectorCreate(TYPE_CELL);
    HookEvent("player_death",Event_PlayerDeath);
}

public GetClientVectorPosition(client)
{
    for(new x=0;x<SHVectorSize_Cell(vecPlayers);x++)
    {
        new Handle:ply=SHVectorAt_Cell(vecPlayers,x);
        new curClient=SHVectorAt_Cell(ply,0);
        if(client==curClient)
            return x;
    }
    return -1;
}

public Event_PlayerDeath(Handle:event, const String:name[], bool:dontBroadcast)
{
    // This will give the killer 25 xp and if they get to 100 xp they level and their XP goes back to 0
    if(GetEventInt(event,"userid")!=GetEventInt(event,"attacker")&&GetEventInt(event,"attacker")>0)
    {
        new attackerIndex=GetClientOfUserId(GetEventInt(event,"attacker"));
        new vecPos=GetClientVectorPosition(attackerIndex);
        if(vecPos!=-1)
        {
            new Handle:clientVecData=SHVectorAt_Cell(vecPlayers,vecPos);
            new newXP=SHVectorAt_Cell(clientVecData,1)+25;
            SHVectorSetAt_Cell(clientVecData,1,newXP);
            if(newXP>=100)
            {
                SHVectorSetAt_Cell(clientVecData,1,0);
                new newLevel=SHVectorAt_Cell(clientVecData,2)+1;
                SHVectorSetAt_Cell(clientVecData,2,newLevel);
            }
            SHVectorSetAt_Cell(vecPlayers,vecPos,clientVecData);
        }
    }
}

public OnClientPutInServer(client)
{
    if(client>0)
    {
        new Handle:newPlayer=SHVectorCreate(TYPE_CELL);
        SHVectorInsert_Cell(newPlayer,ITER_BACK,client); // The first thing is client index
        SHVectorInsert_Cell(newPlayer,ITER_BACK,0); // Place-holder for XP points
        SHVectorInsert_Cell(newPlayer,ITER_BACK,0); // Place-holder for current level
        SHVectorInsert_Cell(vecPlayers,ITER_BACK,newPlayer); // Put our new player at the end of the vecPlayers vector
    }
}

public OnPluginEnd()
{
    for(new x=0;x<SHVectorSize_Cell(vecPlayers);x++)
        SHVectorFree_Cell(SHVectorAt_Cell(vecPlayers,x));
    SHVectorFree_Cell(vecPlayers);
}

Basically, it is an example of an XP system for a plugin.

Hope you guys get good use out of it.