Combat End Conditionals

[Hurdarr]

Hi all,

I'm trying to code a very simple combat system between a player and a monster. Each one has three variables: HP, Attack and Defense.

The formula for attack is really simple: monsterHP - monsterDefense. The player also gets attacked when I press the "Fight" button.

So heres the deal:

If the player beats the monster (monsterHP <= 0 and playerHP >= 0) I should go to the Win frame.

If the monster beats the player (playerHP <= 0 and monsterHP >= 0), I should be directed to the Lose frame.

If both of the fighters have HP <= 0 I should go to the DRAW frame. This is what I'm having trouble with it.

stop();

var playerHP:int = 1;
var playerAttack:int = 100;
var playerDefense:int = 5;

var monsterHP:int = 1;
var monsterAttack:int = 10;
var monsterDefense:int = 4;

btnFight.addEventListener(MouseEvent.CLICK, fightMonster); 

function fightMonster(MouseEvent:Event):void 
{ 
    playerHP -= monsterAttack - playerDefense; 
    monsterHP -= playerAttack - monsterDefense; 
     
    txtPlayerHP.text = String("Player HP: "+ playerHP); 
    txtMonsterHP.text = String("Monster1 HP: "+ monsterHP); 
    
    if(playerHP <= 0)
    {
        playerHP == 0;
        trace("Player loses!");
    }
    else if(monsterHP <= 0)
    {
        monsterHP == 0;
        trace("You beat the Generic Weak Monster!");
    }
    else if(monsterHP <= 0 && playerHP <= 0)
    {
        trace("Draw!");
    }
     
} 

The first two conditionals work fine but I'm having a hard time with the Draw statement.

Also, is this a good way to code or should I use switches or something else?

Thanks.