C:\Users\MIKE\Desktop\COD3\filterscripts\ACar.pwn(7) : error 010: invalid function or declaration
C:\Users\mike\Desktop\COD3\filterscripts\ACar.pwn(11) : warning 235: public function lacks forward declaration(symbol"OnPlayerStateChange")
C:\Users\mike\Desktop\COD3\filterscripts\ACar.pwn(14) : error 017: undefined symbol "GetPlayerName"
C:\Users\mike\Desktop\COD3\filterscripts\aCar.pwn(14) : warning 202: number of arguments does not match definition
C:\Users\mike\Desktop\COD3\filterscripts\aCar.pwn(16) : error 017: undefined symbol "PLAYER_STATE_DRIVER"
C:\Users\mike\Desktop\COD3\filterscripts\aCar.pwn(18) : error 017: undefined symbol "GetPlayerVehicleID"
C:\Users\mike\Desktop\COD3\filterscripts\aCar.pwn(19) : error 017: undefined symbol "Unrated"
C:\Users\mike\Desktop\COD3\filterscripts\aCar.pwn(21) : error 017: undefined symbol "strcmp"
C:\Users\mike\Desktop\COD3\filterscripts\aCar.pwn(23) : error 017: undefined symbol "RemovePlayerFromVehicle"
C:\Users\mike\Desktop\COD3\filterscripts\aCar.pwn(24) : error 017: undefined symbol "SendClientMessage"
C:\Users\mike\Desktop\COD3\filterscripts\aCar.pwn(30) : warning 203: symbol is never used: "mikeboy"
Pawn compiler 3.2.3664	 	 	Copyright © 1997-2006, ITB CompuPhase


8 Errors.

// On top of your script:

new mikeboy;

// In OnGameModeInit or OnFilterScriptInit

mikeboy = AddStaticVehicle(451,1890.1632,1989.1708,13.4920,179.9223,6,6);

// Outside other functions

public OnPlayerStateChange(playerid, newstate, oldstate)
{
  new PlayerName[24];
  GetPlayerName(playerid, PlayerName, sizeof(PlayerName));

  if(newstate == PLAYER_STATE_DRIVER)
  {
   new Vehicle = GetPlayerVehicleID(playerid);
   if(Vehicle == Unrated)
   {
     if(strcmp(PlayerName,"mikeboy",true))
     {
      RemovePlayerFromVehicle(playerid);
      SendClientMessage(playerid, 0x33AA33AA, "I'm sorry, but this car has been reserved for mikeboy");
     }
   }
  }
  return 1;
}

public OnPlayerStateChange(playerid, newstate, oldstate)
{
new name[MAX_PLAYER_NAME];
GetPlayerName(playerid, name, MAX_PLAYER_NAME);]
new Vehicle = GetVehicleId(playerid);
if(Vehicle = Unrated) 
{
if(strcmp(name, "mikeboy") == 0) 
{
SendClientMessage(playerid, 0x33AA33AA, "Welcome MikeBoy");
else 
{
SendClientMessage(playerid, 0x33AA33AA, "I'm sorry, but this car has been reserved for mikeboy"); 
RemovePlayerFromVehicle(playerid);
}
}
}
return 1;
}

new MyVehicle;

public OnGameModeInit() {
  MyVehicle = AddStaticVehicle(451,1890.1632,1989.1708,13.4920,179.9223,6,6);
  return 1;
}

public OnPlayerStateChange(playerid, newstate, oldstate) {
  new name[MAX_PLAYER_NAME];
  GetPlayerName(playerid, name, MAX_PLAYER_NAME);
  if(oldstate == PLAYER_STATE_ONFOOT && newstate == PLAYER_STATE_DRIVER) {
    if(!strcmp(name, "mikeboy", false) && GetPlayerVehicleID(playerid) == MyVehicle) {
      SendClientMessage(playerid, 0x33AA33AA, "Hi mikeboy"); 
    }
    else {
      RemovePlayerFromVehicle(playerid);
      SendClientMessage(playerid, 0x33AA33AA, "I'm sorry, but this car has been reserved for mikeboy");
    }
  }
  return 1;
}