[Miguel]

I invite you to have a look at the tutorial section, look for commands + sscanf tutorials.

I'll give you an example:

pawn Code:

CMD:setcolor(playerid, params[])
{
    new id, colour;
    
    if (IsPlayerAdmin(playerid))
        SendClientMessage(playerid, -1, "SERVER: Unknown command.");
        
    else if (sscanf(params, "ud", id, colour))
        SendClientMessage(playerid, -1, "USAGE: /setcolor [ player id ] [ colour ]");
        
    else if (id == INVALID_PLAYER_ID)
        SendClientMessage(playerid, -1, "Requested player was not found!");
        
    else
    {
        SetPlayerColor(id, colour);
        SendClientMessage(playerid, COLOR_GREEN, "You succesfully changed the player's colour.");
    }
    return 1;
}